74 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL. 62. 
United States Records. 
CALIFORNIA: Yosemite, May 14, 1916 (H. G. Dyar). 
Fallen Leaf, June 4, 1916 (H. G. Dyar). 
Tahoe City, June 20, 1920 (H. G. Dyar). 
Clio, June 9, 1916 (H. G. Dyar). 
Eureka, May 26, 1903 (H. S. Barber). 
Pacific Grove, July 2, 1903 (I. MacCracken). 
NEvAabA: Glenbrook, August 25, 1915 (H. G. Dyar). 
AEDES (HETERONYCHA) FLAVESCENS Miiller. 
Culex flavescens MULLER, Faun. Ins. Friedrichdalina, p. 87, 1764. 
Culex lutescens Faxsricius, Syst. Ent., p. 800, 1775. 
Culex variegatus SCHRANK, Enum. Ins. Austr., p. 482, 1781. 
Culex bipunctatus RoBINEAU-DESvoIDy, Mém. Soe. Nat. Hist. Paris, vol. 3, 
p. 405, 1827. 
Culex flavus MoTSCHULSKY, Bull. Soc. Imp. Nat. Mosce., vol. 32, p. 503, 1859. 
Culex arcanus BLANCHARD, Les Moust., p. 308, 1905. 
Culex fletcheri CoQuILLETT, U. S. Dept. Agr., Bur. Ent., Tech. Ser. 11, 
p. 20, 1906. 
Aédes cyprius LupLow, Ins. Ins. Mens., vol. 7, p. 158, 1920. 
A large yellowish mosquito. Mesonotum dark yellow on the sides, 
a broad brown median band, contiguous to faint short posterior 
lateral stripes. Abdomen largely or wholly overspread with yellow 
scales, sometimes restricted to basal bands, but diffused and with 
scattered scales; venter yellowish, with black scales intermixed. 
Legs mostly yellow scaled, the tarsi black, with basal white rings on 
the joints, those on the hind legs large. Wings with the scales yel- 
lowish and black, the light ones predominating. 
The winter is passed in the egg state, the larvae developing in the 
larger ground pools on the prairie in early spring. The mating 
habits of the male have not been observed in America. Wesenberg- 
Lund describes them interestingly for the European form.* The 
adults are not abundant, but occasionally met with on prairies and 
open woodlands. Liable to be confused with the little-known 
viparius Which belongs to the fitehii series, but is exactly like this in 
coloration. 
Distribution—Canadian prairies, Montana to Wisconsin; sporadi- 
cally in Arctic regions, Hudson Bay, and Alaska, Europe and Asia. 
United States Records. 
Montana: Dillon, August 4, 1908 (R. A. Cooley). 
Big Fork, November 14, 1904 (H. Ricker). 
NortH Daxota: Devils Lake, July 19, 1921 (H. G. Dyar). 
MINNEsoTA: East Grand Forks, July 24, 1921 (H. G. Dyar). 
Fort Snelling, June 10, 1908 (EB. B. Frick). 
ALASKA: Anchorage, July 10, 16, 19, 1921 (J. M. Aldrich). 
14 Mem. Acad. Roy. Sci. Lett. Danemark, Sec. Sci., sec. 8, vol. 7, pp. 154-156, 1921. 
