272 



Hominoxious Arthropods 



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

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

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

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

 bius farinae, and leg i of male; (*) Otodectes cynotis, tip of abdomen of male, 

 Of) beak and anal plate of Dermanyssus gallinae; (k) palpus of Allothrom- 

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



