40 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 120 
process with approximately eight pointed and distinctly separated 
teeth. Basal process short, straight, and bluntly rounded. 
Larva: Antennal tuft located in a constriction near the outer third; 
antennal shaft spiculate basally. Postclypeal head hair 4 short, 
single; upper and lower frontal head hairs 5 and 6 long, triple and 
barbed; preantennal head hair 7 long, multiple, barbed. Mentum 
with about 12 teeth; the apical tooth very broad and larger than the 
lateral teeth; the subbasal lateral tooth longer than other lateral teeth. 
Body finely spiculate. Comb with many scales in a patch; each 
scale rounded apically and fringed with subequal spinules. Siphonal 
index about 10.0; with three double or single siphonal tufts on the 
apical half of the siphon. Pecten with about 16 teeth on the basal 
fourth of the siphon; the apical tooth separated from the other teeth; 
each tooth with about five coarse barbs on one side. Anal segment 
completely ringed by the saddle, finely spiculate. 
MATERIAL EXAMINED.—T wo male specimens and their associated 
terminalia from Surinam, one of which was a paratype. 
DistrisutTion.—Reported from Surinam (the type locality), 
Colombia, Venezuela, and Brazil. 
Culex (Culex) carcinoxenus Castro, 1932 
Fiaures 10a, 6 
Culex (Culex) carcinoxenus Castro, 1932, p. 99. 
SystemMatics.—In Culex carcinoxenus the apical lobe of the basistyle 
possesses only one accessory seta next to the leaf. This species can 
be distinguished from C. corniger by the normal shape of the external 
process. 
SALIENT CHARACTERS.—Adult female: See table 1. 
Male terminalia: Basistyle conical. Apical lobe somewhat flat- 
tened. Appendicles of the apical lobe as follows: three subequal, 
hooked rods; leaf moderate in size, pointed apically; one rather broad 
accessory seta next to the leaf. Dististyle normal, but with a slight 
median bulge. Tenth sternite crowned with a dense tuft of short, 
pointed spines; the basal arm recurved and moderate in length. 
External process gradually tapering to a point and reaching approxi- 
mately to the ventral cornu. Ventral cornu dentiform, somewhat 
larger than the teeth of the median process. Median process with 
about five distinct teeth. Basal process robust, straight, and pointed. 
Larva: Antennal tuft located in a constriction near the outer third. 
Posteylpeal head hair 4 single; upper frontal head hair 5 triple; lower | 
frontal head hair 6 double; preantennal head hair 7 multiple. Comb | 
with over 25 scales in a triangular patch; individual scales not fringed. 
Siphonal index 5.0 to 5.5; four pairs of siphonal tufts inserted on the 
