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; (e) 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, 
(j) beak and anal plate of Dermanyssus gallinae; ( k ) palpus of Allothrom- 
bium. (a) to (j) after Banks. 
