76 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 120 
Culex (Culex) lygrus Root, 1927 
Ficures 21a, b 
Culex (Culex) lygrus Root, 1927, p. 579. 
SystEmMatics.—This species is similar to Culex renatoi, C. mauesensis, 
and C. pinarocampa. It is distinctive by having a reduced number 
of teeth on the median process of the mesosome and by the 
characteristic external process. 
SALIENT CHARACTERS.—Adult female: See table 1. 
Male terminalia: Basistyle tubular, about three times as long as 
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 
follows: basal rod strong, gently curved at the apex; median rod 
longer and broader than basal rod, and strongly hooked terminally; 
apical rod longer than median rod and prominently hooked; leaf 
moderate in size, obovate, and possessing minute longitudinal stria- 
tions; two accessory setae present, one strong and prominently 
hooked, the other normal, as long as leaf, and gently curved. Tenth 
sternite crowned with a dense tuft of short, pointed spines; basal arm 
very long and recurved; three to five cercal setae present. External 
process very large, broad and long, gently curved so as to be directed 
laterally, and considerably exceeding the ventral cornu. Ventral 
cornu dentiform, larger than the teeth of the median process. Median 
process with about four distinct teeth. Basal process short, straight, 
and bluntly rounded. 
Larva: Unknown. 
MATERIAL EXAMINED.—The lectotype male terminalia. 
DistTRIBUTION.—That of the type locality, Rio de Janeiro, Brazil. 
Culex (Culex) maracayensis Evans, 1923 
FiaurEs 21c, d 
Culex (Culex) maracayensis Evans, 1923, p. 102. 
Culex (Culex) aglischrus Dyar, 1924, p. 121. 
Systematics.—Although related to species lacking a leaf on the 
apical lobe of the basistyle, Culex maracayensis is quite distinctive. 
It is the only member of this group possessing a rounded, rugulose 
ventral cornu, and also exhibits characteristic 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 spicules in addition to the normal long 
setal pattern. Apical lobe of the basistyle prominent, extended into 
a thumblike projection. Appendicles of the apical lobe as follows: 
