198 
Hippoboscidae (.Diptera Pupipara) 
tarsi show what are probably good specific characters in the arrangement of 
the setae and in the presence of small, tooth-like projections on the tarsi. The 
hind tarsi (big. 14 B) have a row of these teeth along each ventral margin of 
each segment; on the front tarsi there are but two of these teeth near the base 
of the last segment. The hind tibiae have, in addition to setae and small 
spines, a large number of small circular structures near their apices (Fig. 14 C) 
which are probably sensory pits. 
Wings (Fig. 14 A) with the whole membrane, back to the basal cross veins, 
densely beset with microscopic setulae which cannot be shown in the figure; 
the stippled portion in the figure is so densely beset with these setulae as to 
appear gray, the remaining portion is yellowish and has only a thin covering 
of setulae. 
9 
e 
Fig. 14. Pseudolfersia spinifera (Leach): A, wing; B, portion of posterior tarsus; C, apex 
of posterior tibia. From paratype of P. diomedecie Coq. 
Abdomen with the basal, chitinized portion of the dorsum extensive. The 
median portion of the dorsum bears a broad area of fine, dense striations and 
the posterior fourth of the dorsum is chitinized. The ventral side is thickly 
beset with fine setae. 
The genitalia of the male show a pair of quite long, tapering external 
processes and internally a pair of pointed structures, probably the superior 
forceps. 
The specimens from “king vulture differ very slightly from the others, 
having the anal area of the wing entirely bare of setulae and the cell 2 M 
(second basal) noticeably wider and shorter. However, the latter character 
is somewhat variable in the specimens examined. 
