98 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 120 
MATERIAL EXAMINED.—Four adult males and associated terminalia 
from Argentina, 10 from Brazil, and 4 from Venezuela. The holo- 
type male was also studied. 
Distrinution.—Reported from the Province of Salta, Argentina 
(the type locality). The author has seen specimens in the U.S. 
National Museum collection from: the Province of Tucuman, Argen- 
tina; the State of Bahia, Brazil; and the State of Zulia, Venezuela. 
Culex beauperthuyt has been reported from Venezuela, Brazil, and 
Panama. 
Culex (Culex) scimitar Branch and Seabrook, 1959 
Figures 29c, d 
Culex (Culex) scimitar Branch and Seabrook, 1959, p. 217. 
Systematics.—In the original description Branch and Seabrook 
(1959) recognized the affinity of this species with Culex nigripalpus; 
however, C. scimitar is readily distinguished from all other members of 
the subgenus by the characteristic shape of the dististyle and by the 
apical annulations found on the dististyle. 
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 follows: 
basal rod strong, straight, and pointed: median rod broader and longer 
than the basal rod, terminating in a prominent hook: apical rod longer 
than, but not as broad as the median rod, also terminating in a promi- 
nent hook: leaf moderate in size, obovate: one long, fine gently curved 
accessory seta present next to the leaf. Dististyle thick at base, 
widening along the inner margin to near the center where it narrows 
abruptly, scimitar-like in an unsclerotized area bordering the ragged 
fringe of the sclerotized integument: the distal third slender to the 
apex and bearing minute annulations along its crest. Tenth sternite 
crowned with a dense tuft of short, pointed spines apically and about 
10 spatulate, scalelike spines on the lateral outer margins: basal arm 
moderate in length, gently curved: two cercal setae present. Ex- 
ternal process somewhat curved and bluntly rounded: exceeding the 
ventral cornu in length. Ventral cornu distinct from the teeth of 
the median process, truncate and serrate. Median process with three 
or four strong, pointed teeth. Basal process broadly spatulate. 
Larva: Antennal tuft located in a constriction near the outer third: 
antennal shaft spiculate basally. Postclypeal head hair 4 short, 
single: upper frontal head hair 5 four branched, long, and barbed: 
lower frontal head hair 6 three branched, long, and barbed: pre- 
