xxvi LIST OF PLATES 



PLATE PAGE 



XV. Pup« OF Simulium. (After Jobbins-Pomeroy) . . 227 



Fig. 1. Respiratory filaments of pupa of Simulium vittalum. 

 " 2. Pupa of Simulium venustum, in pupal case. 

 " 3. Pupa of Simulium bracteatum: A, Side view of filaments. 

 " 4. Fupa, oi Simulium jenningsi. 

 " 5. Pupa of Simulium pictipes, in pupal case. All greatly enlarged. 



XVI. The Stable Fly, Stomoxys calcitrans. (Bishopp) ... . . . . 231 



Fig. 1. Eggs in straw. 

 " 2. PupsB in straw. 

 " 3. Adults on leg of cow. 



XVII. Straw Stack Showing Proper Method of Building Straw Stack. (Bis- 



hopp) 232 



XVIII. The Horn Fly, Lyperosia irriians. (Bishopp) 233 



Fig. 1. Flies on cow, 

 " 2. Cow pasture showing droppings improperly left to breed flies. 



XIX. TABATnD.a! Attacking Cattle: Tabanus phwnops on cow's jaw, and T. 



punctifer on top of shoulder. (Bishopp) 236 



XX. Tabanus punctifer. (Webb, Photos by Dovener) 238 



Fig. 1. Egg masses on grass. 

 " 2. Larva, dorsal view. 

 " 3. Larva, lateral view. 

 " 4. Pupa, lateral view. 

 " 5. Pupa, ventral view. 



XXI. The Clothing Louse, Pediculus corporis. (Pierce and Hutchison, 



Photos by Dovener) . . 302 



Fig. 1 . Female, ventral view. 

 " 2. Male, dorsal view. 



XXII. Eggs of the Clothing Louse, Pediculus corporis 305 



Fig. 1. Mass of eggs, slightly reduced, between seams of trousers (Photo 

 BT Dovener.) 

 " 2. Great enlargement showing eggs hatching. (Photo by Paine.) 

 " 3. Very great enlargement showing structure of eggs with exuviae within. 

 (Photo by Paine.) 



XXIII. Steam Sterilizer in Delousing Station of U. S. Army Medical 

 Corps. The carriage is transferred along the rails in the foreground to rails 

 leading into the other room where another carriage is seen. (Hutchison) 323 



XXIV. Scaly Leg Mite on Chickens. (Bishopp) .... 406 



Fig. 1. Scaly feet of chickens, caused by mite attack. 

 " 2. Scaly leg mites, greatly enlarged. 



XXV. Dipping Scalt Legs of Chicken in Crude Oil. (Bishopp) 407 



XXVI. The Fowl Tick, Argas persicus. (Bishopp) 433 



Pig. 1. Larvae under feathers of chicken. 

 " 2. Unengorged male, ventral view; much enlarged. 

 " 3. Female with eggs, dorsal view; greater enlargement. 

 " 4. Unengorged female, ventral view; same enlargement as fig. 2. 



XXVII. The Cattle Tick, Boophilus annulatus. (Bishopp) ... 435 



Pig. 1. Fully engorged female. 

 " 2. Engorged female depositing eggs. 



XXVIII. Spraying Chicken House with Oil by Means of Knapsack Spray Pump. 



(Bishopp) 447 



