arr. 1. MOSQUITOES OF THE UNITED STATES—DYAR. 95 
Culex annulitarsis MACQUART, WEBB, and BrertH, Hist. Nat. Iles Can., p. 
2, Ins. p. 99; 1839. 
Culex viridifrons WALKER, List Dipt. Brit. Mus., vol. 1, p. 3, 1848. 
Culex excitans WALKER, List Dipt. Brit Mus., vol. 1, p. 4, 1848. 
Culex formosus WALKER, List Dipt. Brit. Mus., vol. 1, p. 4, 1848. 
Culex inexorabilis WALKER, List Dipt. Brit. Mus., vol. 1, p. 4, 1848. 
Culex exagitans WALKER, Ins. Saund., Dipt., p. 480, 1856. 
Culex impatibilis WALKER, Proc. Linn. Soc., Zool., vol. 4, p. 91, 1860. 
Culex zonatipes WALKER, Proc. Linn. Soc., Zool., vol. 5, p. 229, 1861. 
Culex bancrofti Skuse, Proc. Linn. Soc. N. S. W., ser. 2, vol. 8, p. 1740, 1889. 
Culex elegans FicaLsi, Bull. Soc. Ent. Ital., vol. 21, p. 95, 1889. 
Culer rossii GILES, Journ. Trop. Med., vol. 2, p. 64, 1899. 
Stegomyia fasciata luciensis THEOBALD, Mon. Culic., vol. 1, p. 297, 1901. 
Stegomyia fasciata queenslandensis THEOBALD, Mon. Culic., vol. 1, p. 297, 
1901. 
Stegomyia nigeria THEOBALD, Mon. Culic., vol. 1, p. 303, 1901. 
Stegomyia fasciata persistans BANKS, Phil. Journ. Sci., vol. 1, p. 996, 1906. 
Culex anguste-alatus BEcKER, Mitt. Zool. Mus., Berlin, vol. 4, p. 79, 1908. 
Culex albopalposus BrecKkrr, Mitt. Zool. Mus. Berlin, vol. 4, p. 80, 1908. 
Stegomyia fasciata atritarsis Epwarps, Bull. Ent. Res., vol. 10, p. 129, 1920. 
A small blackish mosquito with ringed legs and a lyre-shaped 
silvery marking on the mesonotum. Mesonotum dark brown, with 
two more or less distinct narrow pale yellowish median lines, and an 
outer silvery line, curving outward about the anterior edge of the 
disk and broadened, continued behind narrowly and straight. Ab- 
domen black, with narrow basal segmentals white bands, the apical 
segments silvery also at tip; lateral spots white, on the last seg- 
ments visible dorsally; venter whitish, with black bands on the 
segments posteriorly. Legs black, the femora pale beneath and 
with a silvery line in front; knee spots white; tarsi with white rings 
at the bases of the joints, the last hind tarsal all white. Proboscis 
black. Tips of palpi and tori white. Silvery scales on the clypeus. 
Wing scales black. 
The species is domesticated, seeking houses and breeding in arti- 
ficial containers. The adults bite by day or artificial light and are 
quiet in darkness. The males will swarm about a person sitting in 
a shaded place, but can not bite. The females are the vector of 
yellow fever. The species can not withstand frost and develops best 
at a rather high temperature. 
This is the only species of the subgenus Stegomyia occuring in 
America, and apparently so occurs from having been introduced by 
commerce. Other species of the subgenus occur in the tropics of 
the Old World. 
Distribution.—Tropical regions throughout the world. In sum- 
mer is often carried into temperate regions and can persist till frost. 
United States Records. 
District oF CoLtuMBIA: Washington, July 3, 1901 (J. Carroll). 
Viretnta: Norfolk (R. Blue). 
