18 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL. 62. 
Male genitalia with the second mesosomal plate narrow and strap- 
like, the third oblique truncate at tip, tubelike, the lobe of the side- 
piece with three rods, two setae, a filament, a leaf, and a seta. 
The larvae occur in artificial receptacles by preference, but are also 
found in ground pools when soiled by animal refuse. 
This is the common house mosquito of Europe, introduced by com- 
merce into various temperate regions. It does not persist in the 
tropics. On the Pacific coast, the introduction was from Japan, with 
slight genitalic differences (form pallens Coquillett=comitatus Dyar 
and Knab). 
Distribution.—Europe and Asia, from England to Japan; South 
America, Argentina and Chile; North America, Virginia to Canada 
on the Atlantic and California to British Columbia on the Pacific. 
United States Records. 
NEw HAMPSHIRE: Durham (H. G. Dyar). 
MASSACHUSETTS: West Springfield (I. Knab). 
CoNNEcTICUT: Fairfield, August, 1910 (V. Havard). 
New York: Ithaca (O. A. Johannsen). 
PENNSYLVANIA: Williamsport (H. L. Viereck). 
DISTRICT OF COLUMBIA: Washington, October 20 (H. G. Dyar). 
VIRGINIA: Virginia Beach, September 20, 1911 (H. G. Dyar). 
Intinois: Urbana (F. Knab). 
OHI0: Toledo, September 18, 1915 (T. L. Ramsey). 
CALIFORNIA: San Diego, December 25, 1916 (H. G. Dyar). 
San Juan Capistrano, August 7, 1920 (H. G. Dyar). 
Laguna Beach, July 18, 1915 (W. E. Hilton). 
Roseville, August 20, 1916 (H. G. Dyar). 
WASHINGTON: Vancouver Barracks (Army Medical Museum). 
Group TERRITANS. 
CULEX (CULEX) TERRITANS Walker. 
Culex territans WALKER, Ins. Saund., Dipt., vol. 1, p. 428, 1856. 
Culex restuans THEOBALD, Mon. Culic., vol. 2, p. 142, 1901. 
Culex brehmei Knap, Proc. Biol. Soc. Wash., vol. 29, p. 161, 1916. 
A medium-sized reddish-brown mosquito, the proboscis and legs 
all dark, or the tarsi with faint pale brownish rings at the ends 
of the joints. Mesonotum with narrow curved bronzy brown scales, 
often ornamented with little patches of ight yellowish ones on each 
side of the middle; but these light spots may be wanting. Abdomen 
blackish brown above, with moderate basal segmental whitish bands, 
transverse and even; venter whitish scaled, often with dusky angular 
transverse bands, the cusps directed anteriorly. Wing scales fine and 
hairlike, all brown. 
The male genitalia have the second mesosomal plate short and 
pointed, without denticles. Lobe of the side piece with three rods, 
a seta, a leaf and a seta. 
