x^i LIST OF ILLUSTRATIONS 



PIG. PAGE 



39. Biting louse of horse, Trichodectes parumpilosus 73 



40. Sucking louse of cattle, Hjematopinus eurysternus 74 



41. Sucking louse of calves, Linognathus (Hsematopinus) vituli 75 



42. Biting louse of cattle, Trichodectes scalaris 75 



43. Sucking louse of sheep, Linognathus (Hsematopinus) pedalis. ... 76 



44. Biting louse of sheep, Trichodectes sphaerocephalus 77 



45. Sucking louse of hog, Hsematopinus suis 78 



46. Sucking louse of dog, Linognathus (Hsematopinus) pihferus 78 



47. Biting louse of dog, Trichodectes latus 79 



48. Louse of the cat, Trichodectes subrostratus 79 



49. Louse of chicken, Goniocotes gigas (G. abdominalis) 83 



50. Louse of chicken, Lipeurus caponis (L. variabilis) 83 



51. Louse of chicken, Menopum trigonocephalum (Menopon pallidum) . 83 



52. Louse of turkey, Goniodes stylifer 85 



53. Louse of turkey, Lipeurus meleagridis (L. polytrapezius) 85 



54. Louse of turkey, Menopum (Menopon) biseriatum 85 



55. Louse of duck, Lipeuris anatis (L. squalidus) 85 



56. Louse of ducks and geese, Trinotum (Trinoton) luridum 87 



57. Louse of swan, Philopterus (Docophorus) cygni 87 



58. Louse of swan, Ornithonomus (Ornithobius) cygni 87 



69. Louse of pigeon, Goniocotes compar '. 87 



60. Louse of pigeon, Gonio.des damicornis. . . .■ 87 



61. Bedbug, adult female, mouth-parts etc 91 



62. Diagram of the anatomy of a spider 95 



63. Gamasid poultry mite, young and adult 98 



64. Mange mite of horse 104 



65. Mange mite burrow in human skin 105 



66. Colts affected with sarcoptic mange 106 



67. Leg scab mite of horse ■ • • ■, ^^'^ 



68. Scab mite of sheep, female Ill 



69. Scab mite of sheep, male Ill 



70. Follicular mange mite 116 



71 . Mange mite of cat and rabbit 118 



72. Auricular scab mite of rabbit 118 



73. Portable dipping vat for sheep 127 



74. Mite of scaly leg of poultry, male and female 133 



75. Foot of fowl affected with scaly leg 134 



76. Capitulum of tick 137 



77. Capitulum, scutum, and fore leg of Texas fever tick 137 



78. Stigmal plates of ticks Margaropus, Ixodes, and Dermacentor . . . 138 

 78a. Photomicrograph of stigmal plate of Texas fever tick 138 



79. Fowl tick, adult and larva 139 



80. Spinose ear tick, nymphal form 141 



