NO. 3557 SUBGENUS CULEX—BRAM 85 
Culex nigripalpus is similar to several species possessing a dentiform 
ventral cornu and spatulate spines on the outer lateral margins of the 
tenth sternite. It differs, however, in the arrangement and number 
of appendicles on the apical lobe of the basistyle and in the confor- 
mation of the structures of the mesosome. 
AL 
0.1mm. 
AL 
ee 
Figure 25.—C. nigripalpus, Bahia, Brazil, USNM RB62 163; a, basistyle and dististyle 
b, mesosome. C. oswaldoi, Natal, Brazil, USNM RB62 290 (holotype): ¢c, basistyle and 
dististyle; d, mesosome. 
SALIENT CHARACTERS.—Adult female: See table 1. 
Male terminalia: Basistyle conical, slightly longer than twice the 
basal width; clothed with fine spicules in addition to the normal, long 
setal pattern. Apical lobe of the basistyle prominent, undivided, and 
also clothed with fine spicules. Appendicles of the apical lobe as 
follows: basal rod strong, straight, blunt; median rod longer and 
