272 



Hominoxious Arthropods 



158. (a) Tydeus, beak and leg from below; {b) Cheyletus pyriformis, beak and palpus; 

 (c) beak and claw of Pediculoides; (rf) leg of Sarcoptes; (c) scutum of 

 female of Amblyomma americana; (/) leg i and tip of mandible of Histio- 

 stoma americana; (g) Histiogaster malus, mandible and venter; (A) Aleuro- 

 bius farinas, and leg i of male; (j) Otodectes cynotis, tip of abdomen of male, 

 0") beak and anal plate of Dermany!^sus gallinse; {k) palpus of AUothrom- 

 bium. (a) to (j) after Banks. 



