22 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 120 
in a triangular patch; each scale fringed laterally and at the apex. 
Siphonal index about 4.0; with three pairs of siphonal tufts. Pecten 
with about 10 teeth on the basal third of the siphon; each tooth with 
several barbs along the ventral margin. Anal segment completely 
ringed by the saddle; ventral brush comprised of about six multiple 
tufts. 
MATERIAL EXAMINED.—The holotype and two paratype males and 
their associated larval and pupal skins of Culex scutatus in the U.S. 
National Museum collection. As indicated above, one paratype male 
of OC. scutatus has been compared with the holotype male of C. ab- 
normalis. 
DisrriBuTION.—The states of Mato Grosso and Goiaz, Brazil and 
Villavicencio, Meta, Colombia. 
Culex (Culex) acharistus Root, 1927 
FiaureEs 3c, d 
Culex (Culex) acharistus Root, 1927, p. 578. 
SysTrEmMatTics.—This species is similar to Culex brethest, C. restuans, 
and CO. laticlasper. All four members of this complex demonstrate a 
reduced mesosome. C. acharistus, however, is readily distinguished 
by the presence of minute annulations on the apical third of the 
dististyle. This character is best seen under oil immersion or with 
phase contrast microscopy, and the dististyle must be observed in 
profile. 
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, and 
also clothed with fine setae. Appendicles of the apical lobe as fol- 
lows: basal rod strong and slightly hooked at the apex; median rod — 
longer and broader than the basal rod, terminating in an apical hook; 
distal rod longer than, but not as broad as the median rod, terminating © 
in an apical hook; leaf moderate in size, obovate; two accessory setae 
present, one long, gently curved and pointed, the other very strong, 
about as long as the leaf, and prominently hooked. Dististyle normal — 
in size, but with minute annulations on the crest of the apical third. 
Tenth sternite crowned with a dense tuft of short, pointed spines; 
basal arm moderate in length, strongly curved; four cercal setae pres- 
ent in a compact group. External process broad and prominent, 
gently curved so that the point is directed postero-laterally. Ventral _ 
cornu absent. Median process with a suggestion of two lightly sclerot- _ 
ized teeth. Basal process short, straight, and bluntly rounded. 
