NO. 3557 SUBGENUS CULEX—BRAM 49 
Culex (Culex) usquatus Dyar, 1918 
Ficure 126 
Culex (Culex) usquatus Dyar, 1918b, p. 122. 
Systematics.—The appendicles on the apical lobe of the basistyle 
are distinctive. Rods are absent, but a group of 10 to 15 subequal, 
gently curved setae are evenly distributed on the lobe. A small 
patch of setae is present at the apex of the basistyle; these setae are 
very long, reaching to at least the midpoint of the dististyle The 
mesosome cannot be distinguished from other members of the complex, 
except C. covagarciar. 
SALIENT CHARACTERS.—Adult female: See table 1. 
Male terminalia: Basistyle conical, slightly longer than twice the 
basal width; clothed with fine setae in addition to the normal, long 
setal pattern; at the apex is a small patch of long setae. Apical lobe 
of the basistyle prominent, undivided, and also clothed with fine 
setae. Appendicles of the apical lobe as follows: rods absent; a group 
of approximately 10 to 15 subequal, gently curved setae evenly 
distributed on the lobe; leaf absent. Dististyle normal. Tenth 
sternite crowned with a sparse tuft of short, pointed spines; basal arm 
rather long, gently curved; three cercal setae present. External 
process gradually expanding distally to the midpoint, then tapering 
to a point; slightly exceeding the ventral cornu in length. Ventral 
cornu long and slender, distinctly separated from the teeth of the 
median process, bent so as to be directed laterally; at the crest of the 
bend the margin seems to be somewhat rugulose. Median process 
with five to 10 strong, sharply pointed, subequal teeth. Basal 
process short, straight, and bluntly rounded. 
Larva: Similar to Culex coronator. Detailed descriptions of the 
immature stages are not available, and individual rearings of specimens 
belonging to this species were not examined. 
MATERIAL EXAMINED.—Fifty-one male terminalia from areas 
indicated in table 3. 
DistrisuTion.—Probable distribution of this species is plotted on 
figure 1le. 
Culex (Culex) camposi Dyar, 1925 
Figure 12c 
Culex (Culex) camposi Dyar, 1925, p. 28. 
Systematics.—In this species a group of approximately 10 subequal, 
gently curved setae are evenly distributed on the apical lobe of the 
basistyle. The diagnostic character is a small tubercle distad of the 
221-521—_67—_—4 
