18 



Genus Argas 



Larva: 680-770 /u, in length (minus capitulum), hexapodand nearly 

 spherical (Figs. 19, 20, 24, 25). The larva becomes flattened and longer 

 as it matures, whilst unfed. The capitulum, though inserted ventrally, 

 projects well in front of the body, which is much wrinkled dorsally 

 and ventrally, but has no spiracles or discs. There is a circular or 

 oval unwrinkled area or plate in the middle of the dorsum. There 

 are numerous pennate hairs, the most prominent being a ventral row 



Fig. 25. A. persicus. Larva, ventral aspect. Salmon and Stiles, 1901 

 (figs. 77, 78, 17th Ann. Rep., B.A.L, U.S. Dep. Agr.). 



