| Ægiothus brewsteri, | I. 501, | pl. 22, | fig. 6 | |
| exilipes, | ♂ | I. 498, | pl. 22, | fig. 2 |
| fuscescens, | ♂ | I. 493, | pl. 22, | fig. 3 |
| fuscescens, | I. 493, | pl. 22, | fig. 5 | |
| Agelaius gubernator (shoulder), | ♂ | II. | pl. 33, | fig. 4 |
| gubernator, | ♀ | II. 163, | pl. 33, | fig. 8 |
| phœniceus, | ♂ | II. 159, | pl. 33, | fig. 1 |
| phœniceus, | ♀ | II. 159, | pl. 33, | fig. 2 |
| phœniceus (shoulder), | ♂ | II. 159, | pl. 33, | fig. 3 |
| tricolor (shoulder), | ♂ | II. 165, | pl. 33, | fig. 5 |
| tricolor, | ♂ | II. 165, | pl. 33, | fig. 6 |
| tricolor, | ♀ | II. 165, | pl. 33, | fig. 7 |
| Alauda arvensis, | II. 136, | pl. 32, | fig. 3 | |
| Ammodromus caudacutus, | I. 557, | pl. 25, | fig. 7 | |
| maritimus, | I. 560, | pl. 25, | fig. 8 | |
| Ampelis cedrorum, | ♂ | I. 401, | pl. 18, | fig. 2 |
| garrulus, | ♂ | I. 396, | pl. 18, | fig. 1 |
| Antenor unicinctus, | III. 250. | |||
| Anthus ludovicianus, | I. 171, | pl. 10, | fig. 3 | |
| pratensis, | I. 173, | pl. 10, | fig. 4 | |
| Antrostomus carolinensis, | ♂ | II. 410, | pl. 46, | fig. 1 |
| nuttalli, | ♂ | II. 417, | pl. 46, | fig. 3 |
| vociferus, | ♂ | II. 413, | pl. 46, | fig. 2 |
| Aquila canadensis, | III. 314. | |||
| Archibuteo ferrugineus, | III. 300. | |||
| sancti-johannis, | III. 304. | |||
| Astur atricapillus, | III. 237. | |||
| Asturina plagiata, | III. 246. | |||
| Atthis heloisa, | ♂ | II. 465, | pl. 47, | fig. 6 |
| Auriparus flaviceps, | I. | pl. 7, | fig. 11 | |
| Bonasa sabinei, | III. 454. | |||
| umbelloides, | III. 453, | pl. 61, | fig. 10 | |
| umbellus, | III. 448, | pl. 61, | fig. 3 | |
| umbellus, | III. 448, | pl. 61, | fig. 9 | |
| Bubo arcticus, | III. 64. | |||
| pacificus, | III. 65. | |||
| virginianus, | III. 62. | |||
| Budytes flava, | I. 167, | pl. 10, | fig. 2 | |
| Buteo borealis, | III. 281. | |||
| calurus, | III. 286. | |||
| cooperi, | III. 295. | |||
| elegans, | III. 277. | |||
| harlani, | III. 292. | |||
| krideri, | III. 284. | |||
| lineatus, | III. 275. | |||
| lucasanus, | III. 285. | |||
| oxypterus, | III. 266. | |||
| pennsylvanicus, | III. 259. | |||
| swainsoni, | III. 263. | |||
| zonocercus, | III. 272. | |||
| Calamospiza bicolor, | ♂ | II. 61, | pl. 29, | fig. 2 |
| bicolor, | ♀ | II. 61, | pl. 29, | fig. 3 |
| Callipepla squamata, | ♂ | III. 487, | pl. 63, | fig. 6 |
| Calypte anna, | ♂ | II. 454, | pl. 47, | fig. 7 |
| costæ, | ♂ | II. 457, | pl. 47, | fig. 8 |
| Campephilus principalis, | ♂ | II. 496, | pl. 49, | fig. 1 |
| principalis, | ♀ | II. 496, | pl. 49, | fig. 2 |
| Campylorhynchus affinis, | I. 133, | pl. 8, | fig. 6 | |
| brunneicapillus, | I. 132, | pl. 8, | fig. 5 | |
| Canace canadensis, | III. 416, | pl. 61, | fig. 5 | |
| canadensis, | ♀ | III. 416, | pl. 59, | fig. 6 |
| canadensis, | ♂ | III. 416, | pl. 59, | fig. 5 |
| franklini, | ♂ | III. 419, | pl. 59, | fig. 3 |
| fuliginosus, | III. 495. | |||
| obscurus, | ♂ | III. 422, | pl. 59, | fig. 1 |
| obscurus, | ♀ | III. 422, | pl. 59, | fig. 2 |
| richardsoni, | ♂ | III. 427, | pl. 59, | fig. 4 |
| Cardinalis coccineus, | ♂ | II. | pl. 30, | fig. 8 |
| igneus, | ♂ | II. 103, | pl. 30, | fig. 0 |
| phœniceus, | II. 103, | pl. 30, | fig. 9 | |
| virginianus, | ♀ | II. 100, | pl. 30, | fig. 6 |
| virginianus, | ♂ | II. 100, | pl. 30, | fig. 7 |
| Carpodacus californicus, | ♂ | I. 465, | pl. 21, | fig. 10 |
| californicus, | ♀ | I. 465, | pl. 21, | fig. 11 |
| cassini, | ♂ | I. 460, | pl. 21, | fig. 4 |
| cassini, | ♀ | I. 460, | pl. 21, | fig. 5 |
| frontalis, | ♂ | I. 465, | pl. 21, | fig. 3 |
| frontalis, | ♀ | I. 465, | pl. 21, | fig. 6 |
| hæmorrhous, | ♂ | I. 465, | pl. 21, | fig. 12 |
| rhodocolpus, | ♂ | I. 468, | pl. 21, | fig. 9 |
| purpureus, | ♂ | I. 462, | pl. 21, | fig. 7 |
| purpureus, | ♀ | I. 462, | pl. 21, | fig. 8 |
| Catharista atrata, | III. 351. | |||
| Catherpes mexicanus, | I. 139, | pl. 8, | fig. 4 | |
| Centrocercus urophasianus, | ♂ | III. | pl. 60, | fig. 2 |
| urophasianus, | ♂ | III. | pl. 60, | fig. 4 |
| urophasianus, | III. 429, | pl. 61, | fig. 6 | |
| Centronyx bairdi, | I. 531, | pl. 25, | fig. 3 | |
| Centurus aurifrons, | ♂ | II. 557, | pl. 52, | fig. 3 |
| aurifrons, | ♀ | II. 557, | pl. 52, | fig. 6 |
| carolinus, | ♂ | II. 554, | pl. 52, | fig. 1 |
| carolinus, | ♀ | II. 554, | pl. 52, | fig. 4 |
| uropygialis, | ♂ | II. 558, | pl. 52, | fig. 2 |
| uropygialis, | ♀ | II. 558, | pl. 52, | fig. 5 |
| Certhia americana, | I. 125, | pl. 8, | fig. 11 | |
| mexicana, | I. 128. | |||
| Certhiola bahamensis, | ♂ | I. 428, | pl. 19, | fig. 5 |
| Ceryle alcyon, | ♂ | II. 392, | pl. 45, | fig. 6 |
| cabanisi, | ♂ | II. 396, | pl. 45, | fig. 9 |
| Chætura pelagica, | ♂ | II. 432, | pl. 45, | fig. 7 |
| vauxi, | ♀ | II. 435, | pl. 45, | fig. 8 |
| Chamæa fasciata, | I. 84, | pl. 6, | fig. 8 | |
| Chamæpelia passerina, | ♂ | III. 389, | pl. 58, | fig. 6 |
| Chondestes grammaca, | ♂ | II. 562, | pl. 31, | fig. 1 |
| Chordeiles henryi, | ♂ | II. 404, | pl. 46, | fig. 4 |
| popetue, | II. 407. | |||
| texensis, | ♂ | II. 406, | pl. 46, | fig. 5 |
| Chrysomitris lawrenci, | ♂ | I. 478, | pl. 22, | fig. 14 |
| lawrenci, | ♀ | I. 478, | pl. 22, | fig. 15 |
| arizonæ, | ♂ | I. 476, | pl. 22, | fig. 11 |
| mexicana, | I. | pl. 22, | fig. 12 | |
| mexicana, | ♀ | I. | pl. 22, | fig. 13 |
| pinus, | ♂ | I. 480, | pl. 22, | fig. 16 |
| psaltria, | ♂ | I. 474, | pl. 22, | fig. 9 |
| psaltria, | ♀ | I. 474, | pl. 22, | fig. 10 |
| tristis (summer), | ♂ | I. 471, | pl. 22, | fig. 7 |
| tristis (winter), | ♂ | I. 471, | pl. 22, | fig. 8 |
| Cinclus mexicanus, | I. 56, | pl. 5, | fig. 1 | |
| Circus hudsonius, | III. 214. | |||
| Cistothorus palustris, | I. 161, | pl. 9, | fig. 6 | |
| stellaris, | I. 161, | pl. 9, | fig. 7 | |
| Coccygus americanus, | ♂ | II. 477, | pl. 48, | fig. 3 |
| erythrophthalmus, | II. 484, | pl. 48, | fig. 5 | |
| minor, | II. 482, | pl. 48, | fig. 4 | |
| Colaptes auratus, | ♂ | II. 575, | pl. 55, | fig. 1 |
| auratus, | ♀ | II. 575, | pl. 55, | fig. 2 |
| chrysoides, | ♂ | II. 583, | pl. 54, | fig. 1 |
| chrysoides, | ♀ | II. 583, | pl. 54, | fig. 2 |
| hybridus, | ♂ | II. 582, | pl. 54, | fig. 3 |
| mexicanus, | ♂ | II. 578, | pl. 55, | fig. 3 |
| mexicanus, | ♀ | II. 578, | pl. 55, | fig. 4 |
| Collurio borealis, | ♂ | I. 415, | pl. 19, | fig. 1 |
| borealis (Juv.) | I. 415, | pl. 19, | fig. 2 | |
| excubitoroides, | ♂ | I. 421, | pl. 19, | fig. 3 |
| ludovicianus, | ♂ | I. 418, | pl. 19, | fig. 4 |
| robustus, | I. 420. | |||
| Columba fasciata, | ♂ | III. 360, | pl. 57, | fig. 2 |
| flavirostris, | ♂ | III. 366, | pl. 57, | fig. 3 |
| leucocephala, | ♂ | III. 363, | pl. 57, | fig. 4 |
| Contopus borealis, | ♂ | II. 353, | pl. 44, | fig. 1 |
| pertinax, | ♂ | II. 356, | pl. 44, | fig. 2 |
| richardsonii, | ♂ | II. 360, | pl. 44, | fig. 4 |
| virens, | ♂ | II. 357, | pl. 44, | fig. 3 |
| Conurus carolinensis, (Ad.) | II. 587, | pl. 56, | fig. 1 | |
| carolinensis, (Juv.) | II. 587, | pl. 56, | fig. 2 | |
| Corvus americanus, | ♂ | II. 243, | pl. 37, | fig. 5 |
| carnivorus, | ♀ | II. 234, | pl. 37, | fig. 6 |
| caurinus, | ♂ | II. 248, | pl. 37, | fig. 3 |
| cryptoleucus, | II. 242, | pl. 37, | fig. 8 | |
| floridanus, | II. 247, | pl. 37, | fig. 9 | |
| mexicanus, | ♂ | II. 233, | pl. 37, | fig. 4 |
| ossifragus, | II. 251, | pl. 37, | fig. 7 | |
| Coturniculus henslowi, | ♀ | I. 553, | pl. 25, | fig. 5 |
| leconti, | ♀ | I. 552, | pl. 25, | fig. 6 |
| ochrocephalus, | II. | pl. 46, | fig. 6 | |
| passerinus, | I. 553, | pl. 25, | fig. 4 | |
| perpallidus, | I. 556. | |||
| Cotyle riparia, | ♂ | I. 353, | pl. 16, | fig. 14 |
| Crotophaga ani, | ♀ | II. 488, | pl. 48, | fig. 2 |
| Cupidonia cupido, | III. 440, | pl. 61, | fig. 1 | |
| cupido, | III. 440, | pl. 61, | fig. 7 | |
| pallidicincta, | III. 446. | |||
| Cyanocitta arizonæ, | II. 292, | pl. 41, | fig. 2 | |
| californica, | ♂ | II. 288, | pl. 40, | fig. 1 |
| couchi, | II. 293. | |||
| floridana, | ♂ | II. 285, | pl. 40, | fig. 4 |
| sordida, | II. 292, | pl. 41, | fig. 1 | |
| sumichrasti, | ♂ | II. | pl. 40, | fig. 2 |
| woodhousei, | ♂ | II. 291, | pl. 40, | fig. 3 |
| Cyanospiza amœna, | ♂ | II. 84, | pl. 29, | fig. 11 |
| amœna, | ♀ | II. 84, | pl. 29, | fig. 12 |
| ciris, | ♂ | II. 87, | pl. 29, | fig. 7 |
| ciris, | ♀ | II. 87, | pl. 29, | fig. 8 |
| cyanea, | ♂ | II. 82, | pl. 29, | fig. 13 |
| cyanea, | ♀ | II. 82, | pl. 29, | fig. 14 |
| parellina, | ♂ | II. | pl. 29, | fig. 6 |
| versicolor, | ♂ | II. 86, | pl. 29, | fig. 9 |
| versicolor, | ♀ | II. 86, | pl. 29, | fig. 10 |
| Cyanura coronata, | ♂ | II. | pl. 39, | fig. 4 |
| cristata, | ♂ | II. 273, | pl. 42, | fig. 3 |
| frontalis, | ♂ | II. 279, | pl. 39, | fig. 2 |
| macrolopha, | ♂ | II. 281, | pl. 39, | fig. 3 |
| stelleri, | ♂ | II. 277, | pl. 39, | fig. 1 |
| Cyrtonyx massena, | III. 492, | pl. 61, | fig. 2 | |
| massena, | ♂ | III. 492, | pl. 64, | fig. 3 |
| massena, | ♀ | III. 492, | pl. 64, | fig. 6 |
| Dendroica æstiva, | I. 222, | pl. 14, | fig. 1 | |
| albilora, | ♂ | I. 240, | pl. 14, | fig. 7 |
| auduboni, | I. 229, | pl. 13, | fig. 1 | |
| blackburniæ, | ♂ | I. 237, | pl. 13, | fig. 2 |
| blackburniæ, | ♀ | I. 237, | pl. 13, | fig. 3 |
| cærulea, | ♂ | I. 235, | pl. 13, | fig. 10 |
| cærulea, | ♀ | I. 237, | pl. 13, | fig. 11 |
| cærulescens, | ♂ | I. 254, | pl. 12, | fig. 10 |
| cærulescens, | ♀ | I. 254, | pl. 12, | fig. 11 |
| castanea, | ♂ | I. 251, | pl. 13, | fig. 4 |
| castanea, | ♀ | I. 251, | pl. 13, | fig. 5 |
| chrysopareia, | ♂ | I. 260, | pl. 12, | fig. 6 |
| coronata, | ♂ | I. 227, | pl. 12, | fig. 9 |
| coronata, | ♀ | I. 227, | pl. 12, | fig. 12 |
| discolor, | ♂ | I. 276, | pl. 14, | fig. 9 |
| dominica, | ♂ | I. 240, | pl. 14, | fig. 5 |
| graciæ, | ♂ | I. 243, | pl. 14, | fig. 10 |
| kirtlandi, | ♂ | I. 272, | pl. 14, | fig. 5 |
| maculosa, | ♂ | I. 232, | pl. 14, | fig. 2 |
| montana, | I. 271, | pl. 14, | fig. 3 | |
| nigrescens, | ♂ | I. 258, | pl. 12, | fig. 8 |
| occidentalis, | ♂ | I. 266, | pl. 12, | fig. 5 |
| olivacea, | ♂ | I. | pl. 14, | fig. 4 |
| palmarum, | ♂ | I. 273, | pl. 14, | fig. 8 |
| pennsylvanica, | ♂ | I. 245, | pl. 13, | fig. 7 |
| pennsylvanica, (Juv.) | ♂ | I. 245, | pl. 13, | fig. 8 |
| pinus, | ♂ | I. 268, | pl. 13, | fig. 6 |
| striata, | ♂ | I. 248, | pl. 13, | fig. 9 |
| striata, | ♀ | I. 248, | pl. 13, | fig. 12 |
| townsendi, | ♂ | I. 265, | pl. 12, | fig. 7 |
| virens, | ♂ | I. 261, | pl. 12, | fig. 4 |
| Dolichonyx orizyvorus, | ♂ | II. 149, | pl. 32, | fig. 4 |
| orizyvorus, | ♀ | II. 149, | pl. 32, | fig. 5 |
| Ectopistes migratoria, | ♂ | III. 368, | pl. 57, | fig. 5 |
| Elanus leucurus, | III. 198. | |||
| Embernagra rufivirgata, | II. 47, | pl. 28, | fig. 3 | |
| Empidonax acadicus, | ♂ | II. 374, | pl. 44, | fig. 11 |
| difficilis, | II. 380. | |||
| flaviventris, | ♂ | II. 378, | pl. 44, | fig. 12 |
| hammondii, | ♂ | II. 383, | pl. 44, | fig. 7 |
| minimus, | ♂ | II. 372, | pl. 44, | fig. 10 |
| obscurus, | ♂ | II. 381, | pl. 44, | fig. 6 |
| pusillus, | ♂ | II. 366, | pl. 44, | fig. 9 |
| traillii, | ♂ | II. 369, | pl. 44, | fig. 8 |
| Eremophila cornuta, | ♂ | II. 141, | pl. 32, | fig. 1 |
| cornuta, (Juv.) | II. 141, | pl. 32, | fig. 2 | |
| Euspiza americana, | ♂ | II. 65, | pl. 28, | fig. 11 |
| americana, | ♀ | II. 65, | pl. 28, | fig. 12 |
| townsendi, | ♀ | II. 68, | pl. 28, | fig. 13 |
| Falco anatum, | III. 132. | |||
| candicans, | III. 111. | |||
| columbarius, | III. 144. | |||
| femoralis, | III. 155. | |||
| isabellinus, | III. 171. | |||
| islandicus, | III. 113. | |||
| labradora, | III. 117. | |||
| pealei, | III. 137. | |||
| polyagrus, | III. 123. | |||
| richardsoni, | III. 148. | |||
| sacer, | III. 115. | |||
| sparverius, | III. 169. | |||
| suckleyi, | III. 147. | |||
| Galeoscoptes carolinensis, | I. 52, | pl. 3, | fig. 5 | |
| Geococcyx californianus, | ♂ | II. 492, | pl. 48, | fig. 1 |
| Geothlypis macgillivrayi, | ♂ | I. 303, | pl. 15, | fig. 4 |
| macgillivrayi, | ♀ | I. 303, | pl. 15, | fig. 5 |
| philadelphia, | ♂ | I. 301, | pl. 15, | fig. 6 |
| philadelphia, | ♀ | I. 301, | pl. 15, | fig. 9 |
| trichas, | ♂ | I. 297, | pl. 15, | fig. 7 |
| trichas, | ♀ | I. 297, | pl. 15, | fig. 8 |
| Glaucidium californicum, | III. 81. | |||
| ferrugineum, | III. 85. | |||
| Guiraca cærulea, | ♂ | II. 77, | pl. 29, | fig. 4 |
| cærulea, | ♀ | II. 77, | pl. 29, | fig. 5 |
| Gymnokitta cyanocephala, | ♂ | II. 260, | pl. 38, | fig. 2 |
| Haliaëtus albicilla, | III. 324. | |||
| leucocephalus, | III. 326. | |||
| Harporhynchus cinereus, | I. 40, | pl. 4, | fig. 2 | |
| crissalis, | I. 47, | pl. 4, | fig. 1 | |
| curvirostris, | I. 41, | pl. 3, | fig. 3 | |
| lecontei, | I. 44, | pl. 4, | fig. 3 | |
| longirostris, | I. 39, | pl. 3, | fig. 2 | |
| palmeri, | I. 43. | |||
| redivivus, | I. 45, | pl. 4, | fig. 4 | |
| rufus, | I. 37, | pl. 3, | fig. 1 | |
| Hedymeles ludovicianus, | ♂ | II. 70, | pl. 30, | fig. 4 |
| ludovicianus, | ♀ | II. 70, | pl. 30, | fig. 5 |
| melanocephalus, | ♂ | II. 73, | pl. 30, | fig. 1 |
| melanocephalus, | ♀ | II. 73, | pl. 30, | fig. 2 |
| Heliopædica xantusi, | ♂ | II. 467, | pl. 47, | fig. 3 |
| Helminthophaga bachmani, | ♂ | I. 194, | pl. 11, | fig. 3 |
| celata (var. Cape Lucas), | I. 204, | pl. 11, | fig. 4 | |
| celata (var. Florida), | I. | pl. 11, | fig. 6 | |
| celata (var. Rocky Mts.), | I. 202, | pl. 11, | fig. 5 | |
| chrysoptera, | ♂ | I. 192, | pl. 11, | fig. 2 |
| luciæ, | I. 200, | pl. 11, | fig. 9 | |
| peregrina (in spring), | I. 205, | pl. 11, | fig. 10 | |
| peregrina (in autumn), | I. 205, | pl. 11, | fig. 11 | |
| pinus, | ♂ | I. 195, | pl. 11, | fig. 1 |
| ruficapilla, | I. 196, | pl. 11, | fig. 7 | |
| ruficapilla (var. Calif.), | I. | pl. 11, | fig. 8 | |
| virginiæ, | I. 199, | pl. 11, | fig. 12 | |
| Helmitherus swainsoni, | I. 190, | pl. 10, | fig. 9 | |
| vermivorus, | I. 187, | pl. 10, | fig. 10 | |
| Hesperiphona montana, | I. 449, | pl. 22, | fig. 4 | |
| vespertina, | ♂ | I. 449, | pl. 22, | fig. 1 |
| Hirundo horreorum, | ♂ | I. 339, | pl. 16, | fig. 9 |
| Hylotomus pileatus, | ♀ | II. 550, | pl. 56, | fig. 4 |
| pileatus, | ♂ | II. 550, | pl. 56, | fig. 5 |
| Icteria longicauda, | I. 309. | |||
| virens, | ♂ | I. 307, | pl. 15, | fig. 12 |
| Icterus auduboni, | ♂ | II. 186, | pl. 35, | fig. 1 |
| baltimore, | ♂ | II. 195, | pl. 35, | fig. 5 |
| bullocki, | ♂ | II. 199, | pl. 34, | fig. 3 |
| bullocki, | ♀ | II. 199, | pl. 34, | fig. 7 |
| cucullatus, | ♂ | II. 193, | pl. 35, | fig. 6 |
| parisorum, | ♂ | II. 188, | pl. 35, | fig. 7 |
| spurius, | ♂ | II. 190, | pl. 34, | fig. 4 |
| spurius (Juv.), | ♂ | II. 190, | pl. 34, | fig. 5 |
| spurius, | ♀ | II. 190, | pl. 34, | fig. 6 |
| wagleri, | ♂ | II. | pl. 35, | fig. 2 |
| Ictinia mississippiensis, | III. 203. | |||
| Junco aikeni, | ♂ | I. 584, | pl. 26, | fig. 6 |
| caniceps, | ♂ | I. 587, | pl. 26, | fig. 3 |
| hyemalis, | ♂ | I. 580, | pl. 26, | fig. 5 |
| oregonus, | ♂ | I. 584, | pl. 26, | fig. 2 |
| Lagopus albus, | III. 457, | pl. 61, | fig. 8 | |
| albus (summer), | ♂ | III. 457, | pl. 62, | fig. 1 |
| albus (winter), | ♂ | III. 457, | pl. 62, | fig. 3 |
| albus (summer), | ♀ | III. 457, | pl. 62, | fig. 2 |
| leucurus (summer), | ♂ | III. 464, | pl. 62, | fig. 6 |
| rupestris (winter), | ♂ | III. 462, | pl. 62, | fig. 4 |
| rupestris (summer), | ♀ | III. 462, | pl. 62, | fig. 5 |
| Lanivireo cassini, | ♂ | I. 376, | pl. 17, | fig. 9 |
| flavifrons, | ♂ | I. 379, | pl. 17, | fig. 5 |
| plumbea, | ♂ | I. 377, | pl. 17, | fig. 10 |
| solitaria, | ♂ | I. 373, | pl. 17, | fig. 8 |
| Leucosticte arctous, | I. | pl. 23, | fig. 10 | |
| australis, | I. | pl. 23, | fig. 9 | |
| campestris, | I. 507, | pl. 23, | fig. 7 | |
| griseinucha, | ♂ | I. 508, | pl. 23, | fig. 5 |
| littoralis, | I. 507, | pl. 23, | fig. 6 | |
| tephrocotis, | I. 504, | pl. 23, | fig. 8 | |
| Lophophanes atricristatus, | I. 90, | pl. 6, | fig. 2 | |
| bicolor, | I. 87, | pl. 6, | fig. 1 | |
| inornatus, | I. 91, | pl. 6, | fig. 3 | |
| wollweberi, | I. 93, | pl. 6, | fig. 4 | |
| Lophortyx californicus, | III. 479, | pl. 61, | fig. 4 | |
| californicus, | ♂ | III. 479, | pl. 64, | fig. 1 |
| californicus, | ♀ | III. 479, | pl. 64, | fig. 2 |
| gambeli, | ♂ | III. 482, | pl. 64, | fig. 4 |
| gambeli, | ♀ | III. 482, | pl. 64, | fig. 5 |
| Loxia americana, | ♂ | I. 484, | pl. 23, | fig. 1 |
| americana, | ♀ | I. 484, | pl. 23, | fig. 4 |
| leucoptera, | ♂ | I. 488, | pl. 23, | fig. 2 |
| leucoptera, | ♀ | I. 488, | pl. 23, | fig. 3 |
| mexicana, | I. 488, | |||
| Melanerpes angustifrons, | ♂ | II. 573, | pl. 53, | fig. 3 |
| angustifrons, | ♀ | II. 573, | pl. 53, | fig. 4 |
| erythrocephalus, | ♂ | II. 564, | pl. 54, | fig. 4 |
| formicivorus, | ♂ | II. 566, | pl. 53, | fig. 1 |
| formicivorus, | ♀ | II. 566, | pl. 53, | fig. 2 |
| torquatus, | ♂ | II. 561, | pl. 54, | fig. 5 |
| Meleagris gallopavo, | III. 404. | |||
| mexicana, | III. 410. | |||
| Melopeleia leucoptera, | ♂ | III. 376, | pl. 58, | fig. 4 |
| Melospiza fallax, | ♀ | II. 22, | pl. 27, | fig. 10 |
| guttata, | II. 27, | pl. 27, | fig. 12 | |
| heermanni, | ♂ | II. 24, | pl. 27, | fig. 9 |
| insignis, | II. 30, | pl. 27, | fig. 8 | |
| lincolni, | II. 31, | pl. 27, | fig. 13 | |
| melodia, | II. 19, | pl. 27, | fig. 6 | |
| palustris, | ♂ | II. 34, | pl. 28, | fig. 1 |
| palustris, | ♀ | II. 34, | pl. 28, | fig. 2 |
| rufina, | II. 29, | pl. 27, | fig. 11 | |
| samuelis, | II. 26, | pl. 27, | fig. 7 | |
| Micrathene whitneyi, | III. 87. | |||
| Milvulus forficatus, | ♂ | II. 311, | pl. 43, | fig. 1 |
| tyrannus, | II. 309. | |||
| Mimus polyglottus, | I. 49, | pl. 3, | fig. 4 | |
| Mitrephorus pallescens, | ♂ | II. 386, | pl. 44, | fig. 13 |
| Mniotilta varia, | ♂ | I. 180, | pl. 10, | fig. 6 |
| Molothrus pecoris, | ♀ | II. 154, | pl. 32, | fig. 6 |
| pecoris, | ♀ | II. 154, | pl. 32, | fig. 7 |
| obscurus, | ♂ | II. | pl. 32, | fig. 8 |
| Motacilla alba, | I. 165, | pl. 10, | fig. 1 | |
| Myiadestes townsendi, | ♂ | I. 409, | pl. 18, | fig. 5 |
| townsendi (Juv.) | I. 409, | pl. 18, | fig. 6 | |
| Myiarchus cinerascens, | ♂ | II. 337, | pl. 43, | fig. 8 |
| crinitus, | ♂ | II. | pl. 43, | fig. 7 |
| lawrencii, | ♂ | II. | pl. 43, | fig. 9 |
| Myiodioctes canadensis, | ♂ | I. 320, | pl. 16, | fig. 6 |
| minutus, | I. 316, | pl. 16, | fig. 2 | |
| mitratus, | ♂ | I. 314, | pl. 15, | fig. 10 |
| mitratus, | ♀ | I. | pl. 15, | fig. 11 |
| pileolatus, | I. 319. | |||
| pusillus, | ♂ | I. 317, | pl. 16, | fig. 3 |
| pusillus, | ♀ | I. 317, | pl. 16, | fig. 4 |
| Nauclerus forficatus, | III. 192. | |||
| Neocorys spraguei, | ♀ | I. 175, | pl. 10, | fig. 5 |
| Nephœcetes niger, | ♀ | II. 429, | pl. 45, | fig. 4 |
| Nisus cooperi, | III. 230. | |||
| fuscus, | III. 224. | |||
| mexicanus, | III. 231. | |||
| Nyctale richardsoni, | III. 40. | |||
| acadica, | III. 43. | |||
| Nyctea scandiaca, | III. 70. | |||
| Onychotes gruberi, | III. 254. | |||
| Oporornis agilis, | ♂ | I. 290, | pl. 15, | fig. 1 |
| agilis, | ♀ | I. 290, | pl. 15, | fig. 2 |
| formosa, | ♂ | I. 293, | pl. 15, | fig. 3 |
| Oreopeleia martinica, | ♂ | III. 393, | pl. 58, | fig. 1 |
| Oreortyx pictus, | ♂ | III. 475, | pl. 63, | fig. 5 |
| Oreoscoptes montanus, | I. 32, | pl. 3, | fig. 6 | |
| Ortalida macalli, | III. 398, | pl. 57, | fig. 1 | |
| Ortyx texanus, | ♀ | III. 474, | pl. 63, | fig. 4 |
| texanus, | ♂ | III. 474, | pl. 63, | fig. 3 |
| virginianus, | ♂ | III. 468, | pl. 63, | fig. 1 |
| virginianus, | ♀ | III. 468, | pl. 63, | fig. 2 |
| Otus brachyotus, | III. 22. | |||
| wilsonianus, | III. 18. | |||
| Pandion carolinensis, | III. 184. | |||
| Panyptila melanoleuca, | ♂ | II. 424, | pl. 45, | fig. 5 |
| Parula americana, | ♂ | I. 208, | pl. 10, | fig. 7 |
| Parus atricapillus, | I. 96, | pl. 7, | fig. 1 | |
| carolinensis, | I. 102, | pl. 7, | fig. 4 | |
| hudsonicus, | I. 105, | pl. 7, | fig. 7 | |
| montanus, | I. 95, | pl. 7, | fig. 5 | |
| occidentalis, | I. 101, | pl. 7, | fig. 3 | |
| rufescens, | I. 104, | pl. 7, | fig. 6 | |
| septentrionalis, | I. 99, | pl. 7, | fig. 2 | |
| Passerculus alaudinus, | I. 537, | pl. 24, | fig. 11 | |
| anthinus, | I. 539, | pl. 24, | fig. 10 | |
| caboti, | II. | pl. 46, | fig. 9 | |
| guttatus, | I. 544, | pl. 25, | fig. 1 | |
| princeps, | I. 540, | pl. 25, | fig. 2 | |
| rostratus, | I. 542, | pl. 24, | fig. 12 | |
| sandwichensis, | I. 538, | pl. 24, | fig. 9 | |
| savanna, | I. 534, | pl. 24, | fig. 8 | |
| Passerella iliaca, | II. 50, | pl. 28, | fig. 7 | |
| megarhyncha, | II. 57, | pl. 28, | fig. 10 | |
| schistacea, | II. 56. | |||
| townsendi, | ♀ | II. 53, | pl. 28, | fig. 8 |
| Pediœcetes columbianus, | III. 434, | pl. 60, | fig. 1 | |
| phasianellus, | III. 436, | pl. 60, | fig. 3 | |
| Perisoreus canadensis, | ♂ | II. 299, | pl. 41, | fig. 3 |
| canadensis (Juv.) | II. | pl. 42, | fig. 4 | |
| capitalis, | ♂ | II. 302, | pl. 41, | fig. 4 |
| obscurus, | II. 302, | |||
| Perissoglossa carbonata, | I. 214, | pl. 12, | fig. 3 | |
| tigrina, | ♂ | I. 212, | pl. 12, | fig. 1 |
| tigrina, | ♀ | I. 212, | pl. 12, | fig. 2 |
| Petrochelidon lunifrons, | ♂ | I. 334, | pl. 16, | fig. 13 |
| Peucæa æstivalis, | II. 39, | pl. 28, | fig. 4 | |
| arizonæ, | II. 41. | |||
| carpalis, | II. | pl. 46, | fig. 8 | |
| cassini, | II. 42, | pl. 28, | fig. 5 | |
| ruficeps, | II. 45, | pl. 28, | fig. 6 | |
| Phænopepla nitens, | ♂ | I. 405, | pl. 18, | fig. 3 |
| nitens, | ♂ | I. | pl. 18, | fig. 4 |
| Phonipara zena, | ♂ | II. 93, | pl. 29, | fig. 15 |
| zena, | ♀ | II. 93, | pl. 29, | fig. 16 |
| Phyllopneuste borealis, | I. | pl. 5, | fig. 5 | |
| Pica hudsonica, | ♂ | II. 266, | pl. 38, | fig. 1 |
| nuttalli, | ♂ | II. 270, | pl. 38, | fig. 3 |
| Picicorvus columbianus, | II. 255, | pl. 38, | fig. 4 | |
| Picoides americanus, | ♂ | II. 532, | pl. 50, | fig. 2 |
| arcticus, | ♂ | II. 530, | pl. 50, | fig. 1 |
| Picus albolarvatus, | ♂ | II. 526, | pl. 50, | fig. 7 |
| albolarvatus, | ♀ | II. 526, | pl. 50, | fig. 8 |
| borealis, | ♂ | II. 524, | pl. 49, | fig. 8 |
| gairdneri, | II. 512. | |||
| harrisi, | II. 507. | |||
| lucasanus, | II. 519. | |||
| nuttalli, | ♂ | II. 521, | pl. 50, | fig. 3 |
| nuttalli, | ♀ | II. 521, | pl. 50, | fig. 6 |
| pubescens, | ♂ | II. 509, | pl. 49, | fig. 6 |
| pubescens, | ♀ | II. 509, | pl. 49, | fig. 7 |
| scalaris, | ♂ | II. 515, | pl. 50, | fig. 4 |
| scalaris, | ♀ | II. | pl. 50, | fig. 5 |
| villosus, | ♂ | II. 503, | pl. 49, | fig. 3 |
| villosus, | ♀ | II. 503, | pl. 49, | fig. 4 |
| villosus (Juv.) | ♂ | II. 503, | pl. 49, | fig. 5 |
| Pinicola enucleator, | ♂ | I. 453, | pl. 21, | fig. 1 |
| enucleator, | ♀ | I. 453, | pl. 21, | fig. 2 |
| Pipilo aberti, | ♂ | II. 128, | pl. 31, | fig. 7 |
| albigula, | ♂ | II. 127, | pl. 31, | fig. 11 |
| alleni, | II. 112. | |||
| arcticus, | ♂ | II. 119, | pl. 31, | fig. 5 |
| arcticus, | ♀ | II. 119, | pl. 31, | fig. 6 |
| chlorura, | ♂ | II. 131, | pl. 31, | fig. 4 |
| crissalis, | ♂ | II. 122, | pl. 31, | fig. 8 |
| erythrophthalmus, | ♂ | II. 109, | pl. 31, | fig. 2 |
| erythrophthalmus, | ♂ | II. 109, | pl. 31, | fig. 3 |
| megalonyx, | ♀ | II. 113, | pl. 31, | fig. 9 |
| mesoleucus, | ♂ | II. 125, | pl. 31, | fig. 10 |
| oregonus, | ♀ | II. 116, | pl. 31, | fig. 12 |
| Plectrophanes Iapponicus, | ♂ | I. 515, | pl. 24, | fig. 7 |
| maccowni, | ♂ | I. 523, | pl. 24, | fig. 1 |
| melanomus, | ♂ | I. 521, | pl. 24, | fig. 6 |
| nivalis, | ♂ | I. 512, | pl. 24, | fig. 2 |
| ornatus, | ♂ | I. 520, | pl. 24, | fig. 3 |
| pictus, | ♂ | I. 518, | pl. 24, | fig. 4 |
| pictus, | ♀ | I. 518, | pl. 24, | fig. 5 |
| Polioptila cærulea, | I. 78, | pl. 6, | fig. 5 | |
| melanura, | I. 81, | pl. 6, | fig. 7 | |
| plumbea, | I. 80, | pl. 6, | fig. 6 | |
| Polyborus auduboni, | III. 178. | |||
| Poocætes gramineus, | II. 545, | pl. 29, | fig. 1 | |
| Poospiza belli, | I. 593, | pl. 26, | fig. 9 | |
| bilineata, | ♂ | I. 590, | pl. 26, | fig. 8 |
| nevadensis, | I. 594. | |||
| Progne cryptoleuca, | I. 332. | |||
| subis, | ♀ | I. 329, | pl. 16, | fig. 7 |
| subis, | ♂ | I. 329, | pl. 16, | fig. 10 |
| Protonotaria citrea, | I. 184, | pl. 10, | fig. 8 | |
| Psaltriparus melanotis, | I. 108, | pl. 7, | fig. 8 | |
| minimus, | I. 109, | pl. 7, | fig. 9 | |
| plumbeus, | I. 110, | pl. 7, | fig. 10 | |
| Pseudogryphus californianus, | III. 338. | |||
| Psilorhinus morio, | ♀ | II. 304, | pl. 42, | fig. 2 |
| Pyranga æstiva, | ♂ | I. 441, | pl. 20, | fig. 5 |
| æstiva, | ♀ | I. 441, | pl. 20, | fig. 6 |
| cooperi, | ♂ | I. 444, | pl. 20, | fig. 1 |
| cooperi, | ♀ | I. 444, | pl. 20, | fig. 2 |
| hepatica, | ♂ | I. 440, | pl. 20, | fig. 9 |
| hepatica, | ♀ | I. 440, | pl. 20, | fig. 10 |
| ludoviciana, | ♂ | I. 437, | pl. 20, | fig. 3 |
| ludoviciana, | ♀ | I. 437, | pl. 20, | fig. 4 |
| rubra, | ♂ | I. 435, | pl. 20, | fig. 7 |
| rubra, | ♀ | I. 435, | pl. 20, | fig. 8 |
| Pyrgita domestica, | I. 525, | pl. 23, | fig. 12 | |
| Pyrocephalus mexicanus, | ♂ | II. 387, | pl. 44, | fig. 5 |
| Pyrrhula cassini, | ♂ | I. 457, | pl. 23, | fig. 11 |
| Pyrrhuloxia sinuata, | ♂ | II. 95, | pl. 30, | fig. 3 |
| Quiscalus æneus, | II. 218. | |||
| aglæus, | ♂ | II. 221, | pl. 37, | fig. 2 |
| macrourus, | ♂ | II. 225, | pl. 36, | fig. 1 |
| macrourus, | ♀ | II. 225, | pl. 36, | fig. 2 |
| major, | ♂ | II. 222, | pl. 36, | fig. 3 |
| major, | ♀ | II. 222, | pl. 36, | fig. 4 |
| purpureus, | ♂ | II. 214, | pl. 37, | fig. 1 |
| Regulus calendula, | I. 75, | pl. 5, | fig. 9 | |
| cuvieri, | I. 75, | pl. 5, | fig. 7 | |
| satrapa, | I. 73, | pl. 5, | fig. 8 | |
| Rhinogryphus aura, | III. 344. | |||
| Rostrhamus sociabilis, | III. 209. | |||
| Salpinctes obsoletus, | I. 135, | pl. 8, | fig. 3 | |
| Saxicola œnanthe, | I. 60, | pl. 5, | fig. 6 | |
| Sayornis fuscus, | ♂ | II. 343, | pl. 45, | fig. 2 |
| nigricans, | ♂ | II. 340, | pl. 45, | fig. 1 |
| sayus, | ♂ | II. 347, | pl. 45, | fig. 3 |
| Scardafella inca, | ♂ | III. 387, | pl. 58, | fig. 7 |
| Scolecephalus cyanocephalus, | ♀ | II. 206, | pl. 35, | fig. 3 |
| ferrugineus, | ♂ | II. 203, | pl. 35, | fig. 4 |
| Scops asio, | III. 49. | |||
| flammeola, | III. 58. | |||
| floridana, | III. 57. | |||
| kennicotti, | III. 53. | |||
| maccalli, | III. 52. | |||
| Seiurus aurocapillus, | I. 280, | pl. 14, | fig. 11 | |
| ludovicianus, | ♂ | I. 287, | pl. 14, | fig. 13 |
| noveboracensis, | ♂ | I. 283, | pl. 14, | fig. 12 |
| Selasphorus platycercus, | ♂ | II. 462, | pl. 47, | fig. 5 |
| rufus, | ♂ | II. 459, | pl. 47, | fig. 4 |
| Setophaga picta, | ♂ | II. | pl. 46, | fig. 7 |
| picta, | ♂ | II. | pl. 56, | fig. 3 |
| ruticilla, | ♂ | I. 322, | pl. 16, | fig. 1 |
| ruticilla, | ♀ | I. 322, | pl. 16, | fig. 5 |
| Sialia arctica, | I. 67, | pl. 5, | fig. 4 | |
| mexicana, | I. 65, | pl. 5, | fig. 2 | |
| sialis, | I. 62, | pl. 5, | fig. 3 | |
| Sitta aculeata, | I. 117. | |||
| canadensis, | ♂ | I. 118, | pl. 8, | fig. 7 |
| canadensis, | ♀ | I. 118, | pl. 8, | fig. 8 |
| carolinensis, | ♂ | I. 114, | pl. 8, | fig. 1 |
| carolinensis, | ♀ | I. 114, | pl. 8, | fig. 2 |
| pusilla, | I. 122, | pl. 8, | fig. 9 | |
| pygmæa, | I. 120, | pl. 8, | fig. 10 | |
| Spheotyto hypogæa, | III. 90. | |||
| Spermophila moreleti, | ♂ | II. 91, | pl. 29, | fig. 17 |
| Sphyropicus nuchalis, | ♂ | II. 542, | pl. 51, | fig. 3 |
| nuchalis, | ♀ | II. 542, | pl. 51, | fig. 4 |
| ruber, | ♂ | II. 544, | pl. 51, | fig. 6 |
| thyroideus, | ♂ | II. 547, | pl. 56, | fig. 6 |
| varius, | ♂ | II. 539, | pl. 51, | fig. 1 |
| varius, | ♀ | II. 539, | pl. 51, | fig. 2 |
| williamsoni, | ♀ | II. 545, | pl. 51, | fig. 5 |
| Spizella arizonæ, | II. 11. | |||
| atrigularis, | ♂ | I. 15, | pl. 26, | fig. 11 |
| atrigularis, | ♂ | I. 15, | pl. 26, | fig. 12 |
| breweri, | II. 13, | pl. 27, | fig. 4 | |
| monticola, | II. 3, | pl. 27, | fig. 5 | |
| pallida, | II. 11, | pl. 27, | fig. 3 | |
| pusilla, | ♀ | II. 5, | pl. 27, | fig. 2 |
| socialis, | II. 7, | pl. 27, | fig. 1 | |
| Starnœnas cyanocephala, | ♂ | III. 395, | pl. 58, | fig. 5 |
| Stelgidopteryx serripennis, | ♂ | I. 350, | pl. 16, | fig. 12 |
| Stellula calliope, | ♂ | II. 445, | pl. 47, | fig. 9 |
| Strix pratincola, | III. 13. | |||
| Sturnella magna, | ♂ | II. 174, | pl. 34, | fig. 2 |
| neglecta, | ♂ | II. 176, | pl. 34, | fig. 1 |
| Sturnus vulgaris, | ♂ | II. 229, | pl. 35, | fig. 8 |
| Surnia ulula, | III. 75. | |||
| Syrnium cinereum, | III. 30. | |||
| nebulosum, | III. 34. | |||
| occidentale, | III. 38. | |||
| Tachycineta bicolor, | ♂ | I. 344, | pl. 16, | fig. 8 |
| thalassina, | ♂ | I. 347, | pl. 16, | fig. 11 |
| Thaumatias linnæi, | II. 468. | |||
| Thryothorus berlandieri, | I. 144, | pl. 9, | fig. 2 | |
| bewicki, | ♂ | I. 145, | pl. 9, | fig. 3 |
| bewicki, | I. | pl. 9, | fig. 4 | |
| leucogaster, | I. 147. | |||
| ludovicianus, | I. 142, | pl. 9, | fig. 1 | |
| spilurus, | I. 147. | |||
| Trochilus alexandri, | ♂ | II. 450, | pl. 47, | fig. 1 |
| colubris, | ♂ | II. 448, | pl. 47, | fig. 2 |
| Troglodytes ædon, | I. 149, | pl. 9, | fig. 5 | |
| alascensis, | I. 157, | pl. 9, | fig. 8 | |
| hyemalis, | I. 155, | pl. 9, | fig. 9 | |
| pacificus, | I. | pl. 9, | fig. 10 | |
| parkmanni, | I. 153. | |||
| Turdus aliciæ, | I. 11, | pl. 1, | fig. 3 | |
| auduboni, | I. 21, | pl. 1, | fig. 8 | |
| confinis, | I. 27, | pl. 2, | fig. 1 | |
| fuscescens, | I. 9, | pl. 1, | fig. 5 | |
| iliacus, | I. 23, | pl. 2, | fig. 4 | |
| migratorius, | I. 25, | pl. 2, | fig. 3 | |
| mustelinus, | I. 7, | pl. 1, | fig. 1 | |
| nævius, | I. 29, | pl. 2, | fig. 2 | |
| nanus, | I. 20, | pl. 1, | fig. 7 | |
| pallasi, | I. 18, | pl. 1, | fig. 6 | |
| swainsoni, | I. 14, | pl. 1, | fig. 4 | |
| ustulatus, | I. | pl. 1, | fig. 2 | |
| Tyrannus carolinensis, | ♂ | II. 316, | pl. 43, | fig. 2 |
| couchi, | ♂ | II. 329, | pl. 43, | fig. 6 |
| dominicensis, | ♂ | II. 319, | pl. 43, | fig. 3 |
| verticalis, | ♂ | II. 324, | pl. 43, | fig. 4 |
| vociferans, | ♂ | II. 327, | pl. 43, | fig. 5 |
| Vireo atricapillus, | ♂ | I. 383, | pl. 17, | fig. 6 |
| belli, | ♂ | I. 389, | pl. 17, | fig. 13 |
| huttoni, | ♂ | I. 387, | pl. 17, | fig. 12 |
| noveboracensis, | ♂ | I. 385, | pl. 17, | fig. 11 |
| pusillus, | ♂ | I. 391, | pl. 17, | fig. 14 |
| vicinior, | ♂ | I. 393, | pl. 17, | fig. 7 |
| Vireosylvia barbatula, | ♂ | I. 360, | pl. 17, | fig. 1 |
| flavoriridis, | I. 366. | |||
| gilva, | ♂ | I. 368, | pl. 17, | fig. 3 |
| olivacea, | ♂ | I. 363, | pl. 17, | fig. 2 |
| philadelphica, | I. 367, | pl. 17, | fig. 4 | |
| swainsoni, | I. 371. | |||
| Xanthocephalus icterocephalus, | ♂ | II. 167, | pl. 32, | fig. 9 |
| icterocephalus, | ♀ | II. 167, | pl. 33, | fig. 9 |
| Xanthoura luxuosa, | II. 295, | pl. 42, | fig. 1 | |
| Zenaida amabilis, | ♂ | III. 379, | pl. 58, | fig. 3 |
| Zenaidura carolinensis, | ♂ | III. 383, | pl. 58, | fig. 2 |
| Zonotrichia albicollis, | ♂ | I. 574, | pl. 26, | fig. 10 |
| coronata, | ♂ | I. 573, | pl. 26, | fig. 1 |
| gambeli, | ♂ | I. 569, | pl. 25, | fig. 11 |
| gambeli, (Juv.) | I. 569, | pl. 25, | fig. 12 | |
| leucophrys, (Juv.) | ♂ | I. 566, | pl. 25, | fig. 9 |
| leucophrys, | ♂ | I. 566, | pl. 25, | fig. 10 |
| querula, (Ad.) | ♂ | I. 577, | pl. 26, | fig. 4 |
| querula, (autumn) | I. 577, | pl. 26, | fig. 7 |