106 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 120 
addition to the normal, long setal pattern. Apical lobe of the basistyle 
prominent, undivided, also clothed with fine spicules. Appendicles 
of the apical lobe as follows: basal, median, and apical rods subequal 
in length, very fine, pointed, and gently curved terminally; beyond the 
apical rod are three or four fine, straight, and pointed accessory setae; 
leaf absent. Dististyle normal. Tenth sternite crowned with a sparse 
tuft of short pointed spines; basal arm moderate in length, distinctly 
curved; four cercal setae present. External process gradually tapering 
to a blunt point; reaching to the ventral cornu in length. Ventral 
cornu dentiform, similar in shape, but slightly larger than the teeth of 
the median process. Median process with about five distinct, sharply 
pointed 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: 
frontal head hairs 5, 6, and 7 multiple, long, and barbed. Mentum 
with about 11 very broad teeth, the apical tooth larger than the 
lateral teeth. Thorax and abdomen densely covered with rather long, 
fine spicules. Comb with numerous scales in a patch; each scale 
rounded apically and fringed with subequal spinules. Siphonal index 
about 4.5; five multiple siphonal tufts inserted beyond the pecten. 
Pecten with about 16 teeth on the basal fourth of the siphon; each 
tooth with coarse barbs on one side. Anal segment spiculate, com- 
pletely ringed by the saddle. 
MaTiERIAL EXAMINED.—Four adult males and associated terminalia 
from Brazil, one from Colombia, and one from Surinam. The lecto- 
type male terminalia has also been studied. 
DistrisuTion.—Reported from Surinam, French Guiana, Vene- 
zuela, Brazil, and Bolivia. One specimen in the U.S. National 
Museum collection from La Dorada, Colombia has been examined 
by the author. 
Culex (Culex) tarsalis Coquillett, 1896 
FiauREs 32c, d 
Culex (Culex) tarsalis Coquillett, 1896, p. 43. 
Culex (Culex) willistont Giles, 1900, p. 281. 
Culex (Culex) kelloggit Theobald, 1903b, p. 211. 
Systematics.—Culex tarsalis demonstrates close affinity with C. 
abnormalis in structures of the male terminalia, but may be distin- 
guished by the arrangement and number of the appendicles on the 
apical lobe of the basistyle. 
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. Apical lobe of the basistyle prominent, undivided, 
