28 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL. 62. 
like, forming more or less conspicuous spots on the bases of the forks 
of the second and fourth veins, and along the second and fourth veins 
within the cross veins. 
The male genitalia have the aedoeagus simple; a short row of 
spines on the penultimate segment. 
The larvae live in permanent pools of a dirty character, and take 
readily to artificial receptacles, this being the common water-barrel 
mosquito of the West. The adults hibernate; the eggs are laid in 
narrow rafts on the surface of water. The adults will attack man, 
but rarely, preferring larger mammals. A man on horseback is 
generally immune, though the horse may be bitten. 
Distribution —Northern Rocky Mountains and the Pacific coast 
from southern California to Alaska. 
United States Records. 
New Mexico: Las Vegas Hot Springs, August 12 (H. S. Barber). 
Santa Fe, July (T. D. A. Cockerell). 
ARIZONA: Grand Canyon, May, 1906 (H. G. Dyar). 
CALIFORNIA: San Diego, February 3, 1906 (J. M. French). 
Los Angeles, June 10, 1906 (H. G. Dyar). 
Stanford University, October 11, 1900 (I. MacCracken). 
Lake Tahoe, June 8, 1916 (H. G. Dyar). 
Dunsmuir (A. N. Caudell). 
NevApA: Reno, August 18, 1915 (H. G. Dyar). 
Glenbrook, August 29, 1915 (H. G. Dyar). 
OrEGon: Portland (R. P. Currie). 
Forest Grove, August 31, 1920 (Edna Bond). 
Hood River, July 22, 1917 (F. R. Cole). 
WASHINGTON: Bellingham, May 31, 1917 (H. G. Dyar). 
Ashford, June 18, 1917 (H. G. Dyar). 
Lake Cushman, July 4, 1920 (H. G. Dyar). 
Montana: Big Fork (E. Ricker). 
ALASKA: Cape Fanshaw, June 26, 1919 (H. G. Dyar). 
CULISETA (CULISETA) IMPATIENS Walker. 
Culex impatiens WALKER, List Dipt. Brit. Mus., vol. 1, p. 5, 1848. 
Culex pinguis WALKER, Lord’s Nat. in Vance. Is. & B. C., vol. 2, p. 337, 1866. 
Culex absobrinus FELT, Bull. 79, N. Y. State Mus., p. 391c, 1904. 
A very large dark-brown mosquito. Proboscic and palpi black. 
Mesonotum with two broad impressed lighter brown lines, the vesti- 
ture sparse, and forming frosted yellowish lines on each side posteri- 
orly. Abdomen black, with basal segmental white bands; venter 
mostly whitish. Legs black, the femora white beneath; knee spots 
pale. Wings broad, the cross veins nearly in line, the scales all 
blackish, coarsely linear; a small tuft at base of third vein, but no 
scales on the cross veins. 
The male genitalia have the aedoeagus simple; a long row of 
spines on the penultimate segment. 
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