84 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 120 
fine, single; upper frontal head hair 5 long, five branched, barbed; 
lower frontal head hair 6 long, triple, barbed; preantennal head hair 7 
multiple, long, barbed. Mentum with about 19 teeth; the apical tooth 
larger and broader than the lateral teeth; the two basal lateral teeth 
larger than the other lateral teeth. Thorax minutely spiculate; abdo- 
men glabrous. Comb with numerous scales in a triangular patch; each 
scale rounded apically and fringed with subequal spinules. Siphonal 
index about 5.0; with three pairs of double siphonal tufts located 
beyond the pecten. Pecten with about 12 teeth on the basal third of 
the siphon; each tooth with coarse barbs on one side. Anal segment 
completely ringed by the saddle, which possesses distinct spicules 
dorsally. 
MATERIAL EXAMINED.—There were 137 adult male specimens and 
associated terminalia from Argentina, Brazil, British Guiana, Colom- 
bia, Costa Rica, Honduras, Panama, Peru, Surinam, Venezuela, and 
Trinidad. 
Distripution.—Reported from ‘Trinidad (the type locality), 
Mexico, Honduras, British Honduras, Costa Rica, Panama, Colombia, 
Venezuela, Guianas, Ecuador, Peru, and Brazil. The author has 
examined specimens in the U.S. National Museum collection from 
Monteros and Concepcién, Tucuman, Argentina. 
Culex (Culex) nigripalpus Theobald, 1901 
Fiaures 25a, b 
Culex (Culex) nigripalpus Theobald, 1901, p, 322. 
Culex (Culex) palus Theobald, 1903a, p. 194. 
Culex (Culex) similis Theobald, 1903a, p. 207. 
Culex (Culex) biocellatus Theobald, 1903b, p. 224. 
Culex (Culex) microsquamosus Theobald, in Grabham, 1905, p. 407. 
Culex (Culex) mortificator Dyar and Knab, 1906b, p. 210. 
Culex (Culex) carmodyae Dyar and Knab, 1906b, p. 210. 
Culex (Culex) factor Dyar and Knab, 1906b, p. 212. 
Culex (Culex) regulator Dyar and Knab, 1906b, p. 213. 
Culex (Culex) microannulata Theobald, 1907, p. 481. 
Culex (Culex) proximus Dyar and Knab, 1909b, p. 38. 
Culex (Culex) caraibeus Howard, Dyar, and Knab, 1912 [1913], p. 333. 
Culex (Culex) prasinopleurus Martini, 1914, p. 68. 
Culex (Culex) azuayus Levi-Castillo, 1954, p. 264. [New synonymy.] 
SysTEMATIcs.—A specimen in the U.S. National Museum collection 
labeled by Levi-Castillo as Culex azuayus from the type locality, has 
been thoroughly studied and appears to be the specimen from which 
the original figure of CO. azuayus was made. ‘There is no doubt that 
this is a specimen of C. nigripalpus. Since the type material is im- 
properly labeled and the description of C. azuayus is vague and in- 
complete, C. azuayus is here placed into synonymy with C. nigripalpus. 
