1957] 
Hull — Asilidae 
95 
a narrow stripe of yellow pollen runs from the cervix to 
the back of the ocelli. Front with scanty, yellow pollen, 
somewhat more conspicuous on the upper half ; side of 
front with 4 slender, black bristles on each side, face with 
dense, appressed, pale yellow pubescence continued on to 
the cheeks. Lateral occipital pubescence of the same color. 
The bristly pile of the lower occiput and its coarse hairs 
pale yellow. On the upper half there are only numerous, 
slender, black bristles in several rows, stouter above, but 
never very stout, the dorsal elements strongly proclinate. 
Ocellarium bristles black and very weak. Mystax of face 
composed of numerous, long, moderately stout, yellowish 
white bristles in a high, medial triangle on the lower fourth 
of face, which is barely produced. Upper face with 2 
vertical rows of long, bristly, yellow hairs which become 
longer dorsally and curve downward. Proboscis and anten- 
na black, bristles and hairs of the former yellow, of the 
latter black. Second antennal segment not as long as the 
first segment, third segment a little attenuate with short, 
cylindrical microsegment, which bears at its apex a small 
spine. Thorax : The thorax is black, opaque with well 
differentiated, fine, acrostical and dorsocentral rows of 
setae. The dorsocentral row posteriorly has 4 stout and 
6 weak, long bristles. Humerus and whole lateral margins 
and a short, medial, prescutellar wedge-shaped stripe pale 
yellow micropubescent. Whole disc of the flat scutellum 
with similar, paler pubescence. Upper half of mesopleuron 
and whole pleuron except the greater part of the meso- 
pleuron is yellowish micropubescent. Coxae and trochan- 
ters black. Legs : The legs are very pale, reddish brown; 
apices of all of the tibiae and femora narrowly blackish. 
Tarsi black, except the basal half of the basitarsus, all of 
which are reddish. Claws moderately sharp; pulvilli well 
developed. Wings: The wings are almost hyaline, but 
everywhere with sparse, greyish villi, except that much 
of the basal cells are bare. Abdomen : The abdomen is 
black to and including the base of the sixth tergite and 
sternite; beyond this point the abdomen is light brownish 
orange. Pile of the abdomen pale yellow, more reddish 
on the orange colored, apical segments and appearing dark 
