36 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 120 
clothed with fine setae. Appendicles of the apical lobe as follows: 
basal rod strong, pointed and slightly curved; median and apical rods 
slightly longer than the basal rod, gently hooked at the distal end; 
leaf normal, obovate, with minute, longitudinal striations visible; one 
accessory seta gently curved and about as long as the leaf, the other 
accessory seta is prominently hooked and flattened apically. Disti- 
style normal. Tenth sternite crowned with a dense tuft of short, 
pointed spines; basal arm somewhat flattened and bent at an acute 
angle; two or three cercal setae present. External process lightly 
sclerotized (difficult to see without phase contrast), short, straight, 
and obtuse. Ventral cornu dentiform, equal in size and shape to the 
teeth of the median process. Median process with one to three 
strong, straight teeth, which are somewhat extended laterally. Basal 
process short, pointed, and directed anteriorly. 
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; pre- 
antennal head hair 7 multiple. Mentum with about 17 teeth; the 
apical tooth very broad and longer than lateral teeth; the two basal 
lateral teeth longer than other lateral teeth. ‘Thorax spiculate. 
Comb with numerous scales in a patch; each scale rounded apically 
and fringed with subequal spinules. Siphonal index about 3.5; with 
three pairs of double or triple siphonal tufts present beyond the 
pecten. Pecten with about 12 teeth on the basal third of the siphon; 
each tooth with four to six coarse barbs on one side. Anal segment 
spiculate, completely ringed by the saddle. 
MatTERIAL EXAMINED.—The male terminalia of 53 specimens from 
Argentina, Brazil, Mexico, and Venezuela, as well as the lectotype 
male from Bolivia; twelve larval specimens from Brazil. 
DistRiIBuTION.—It appears that Culex bidens has a more southern 
distribution than its close relative, C. declarator. It ranges from 
central Argentina northward to Venezuela and into southern Mexico. 
Little reliance can be placed on previous records due to the confusion 
between this species and the names declarator, interfor, and virgultus. 
Culex (Culex) bonneae Dyar and Knab, 1919 
Figures 8c, d 
Culex (Culex) bonneae Dyar and Knab, 1919, p. 3. 
SystEMaAtics.—In the male terminalia this species is very similar — 
to Culex saltanensis but can be distinguished by the lack of pilosity on | 
the tenth sternite. The appendicles of the apical lobe of the basistyle | 
also differ between these two species. 
