Fig. 
Plate IVa. 
1--Boophilus Annulatus. 
(Engorged females), 
A—Ven'ral view. 
B—Dorsal v:iew of same 
Anus. 
Lateral constrictions. 
Rudimentary dorsal shield. 
Short rostrum 
Longitudinal dorsal depres- 
sions. 
Legs. 
Stigmen. 
Fig. 
2—Amblyomma  Ameri- 
canum, 
(engorged female), 
-\—Dorsal view. 
B—Ventral 
view. 
aAnus, 
Well developed dorsal 
shield, showing white 
spot. 
Rostrum. 
Longitudinal 
Stigmen. 
Legs. 
depressions, 
Fix. 3—Ornithodoros Megnini. 
(Engorged females), 
A—Dorsal view. 
view. 
B—Ventral 
a, Restryzm, 
b, Legs. 
c, Body tapering posteriorly. 
