ILLUSTRATIONS
| FIG. | PAGE | |
Photograph of enlarged model of the house-fly (Musca domestica) |
Frontispiece | |
| 1. | Pediculus vestimenti |
2 |
| 2. | Pediculus vestimenti (dorsal and ventral views) |
6 |
| 3. | Cimex lectularius (male) |
24 |
| 4. | Egg of Cimex lectularius |
28 |
| 5. | Newly hatched young of Cimex lectularius |
29 |
| 6. | Pulex irritans (female) |
36 |
| 7. | Larva of Pulex irritans |
39 |
| 8. | Pupa of flea |
41 |
| 9. | Ceratophyllus gallinulae (male and female) |
44 |
| 10. | Ephestia kühniella. Moth-infested biscuit |
47 |
| 11. | Ephestia kühniella |
49 |
| 12. | Ephestia kühniella (larva and pupa) |
50 |
| 13. | Corcyra cephalonica. Moth-infested biscuit |
51 |
| 14. | Eggs of Musca domestica |
59 |
| 15. | Eggs of M. domestica |
60 |
| 16. | Abdomen of female house-fly, showing the extended ovipositor |
61 |
| 17. | Mature larva of M. domestica |
62 |
| 18. | ‘Nymph’ of M. domestica dissected out of pupal-case about thirty hours after pupation |
63 |
| 19. | Pupal-case or puparium of M. domestica from which the imago has emerged |
64 |
| 20. | M. domestica in the act of regurgitating food |
65 |
| 21. | Foot of a fly, showing hairs bearing bacteria |
69 |
| 22. | Chart illustrating the relation of the numerical abundance of house-flies to summer diarrhoea in the city of Manchester in 1904 |
71 |
| 23. | Latrine-fly (Fannia scalaris) |
75 |
| 24. | Larva of F. canicularis |
76 |
| 25. | Blow-fly or blue-bottle (Calliphora erythrocephala) |
77 |
| 26. | Green-bottle (Lucilia caesar) |
79 |
| 27. | Flesh-fly (Sarcophaga carnaria) |
80 |
| 28. | Side view of blow-fly (Calliphora erythrocephala) |
81 |
| 29. | Trombidium holosericeum (female) |
89 |
| 30. | Leptus autumnalis = larva of Trombidium holosericeum |
90 |
| 31. | Leptus autumnalis, with the so-called proboscis |
92 |
| 32. | Leptus autumnalis |
93 |
| 33. | Pediculoides ventricosus (male and female) |
96 |
| 34. | Demodex in hair-follicle of dog. Demodex folliculorum |
98 |
| 35. | Sarcoptes scabiei (female) |
100 |
| 36. | Sarcoptes scabiei (male) |
101 |
| 37. | One of the legs of Sarcoptes scabiei showing the stalked sucker and the curious ‘cross-gartering.’ |
102 |
| 38. | A diagrammatic view of the tunnel made by the female of Sarcoptes scabiei, with the eggs she has laid behind her as she burrows deeper and deeper |
104 |
| 39. | A female Sarcoptes scabiei, with four eggs in different stages of development |
105 |
| 40. | Nephrophages sanguinarius (male and female) |
110 |
| 41. | Evolution of Argas persicus |
113 |
| 42. | Ixodes ricinus (mouth-parts of the female) |
114 |
| 43. | Argas reflexus (female) |
115 |
| 44. | Ornithodorus moubata (an unfed female) |
116 |
| 45. | Ornithodorus moubata (female) |
117 |
| 46. | Ixodes ricinus (male and female) |
118 |
| 47. | Ixodiphagus caucurtei laying eggs in the nymph of Ixodes ricinus |
120 |
| 48. | Hirudo medicinalis |
124 |
| 49. | View of the internal organs of Hirudo medicinalis |
126 |
| 50. | Head of a leech (Hirudo medicinalis) |
130 |
| 51. | Hirudo medicinalis |
133 |
| 52. | Cocoon of the medicinal leech |
142 |
| 53. | A Nephelis forming its cocoon and withdrawing from it |
143 |
| 54. | Cocoons of Nephelis |
144 |
| 55. | A leech-farm in the south of France |
145 |
| 56. | Glossosiphonia heteroclita, with eggs and emerging embryos |
146 |
| 57. | Helobdella stagnalis, with adhering young |
147 |
| 58. | Limnatis nilotica |
150 |
| 59. | Anterior sucker of Hirudo medicinalis |
152 |
| 60. | The Japanese variety of Haemadipsa zeylanica |
156 |
| 61. | Haemadipsa zeylanica (from above) |
157 |
| 62. | Haemadipsa zeylanica (head) |
158 |
| 63. | Haemadipsa zeylanica (land-leeches), on the earth |
159 |