Plate IVb. 



Fig. 4 — Argas 3Iiiiiatus. 



(Engorg-ed females). 

 A — Dorsal view. 

 B — Ventral yiew. 



a, Rostrum. 



b, Legs. 



c, Body. 



Fig. i> — Booiihilu.s AunuJacus. 



(Mature, male). 



Fig. 7 — Ornithoderos Megnini. 



(Section of skin, showing- 

 spines). 



Fig. 5 — Derniaoeutor Electus. 



(Engorged femalej. 



a, Prominent rostrum. 



b, Large white shield. 



c, Legs. 



Fig. S — I^eg Boophilus Annu- 

 latiis. 



a, Tarsus. 



b, Pulvillum. 



c, Hooklets. 



