arr. 1. MOSQUITOES OF THE UNITED STATES—DYAR. 37 
venter pale yellow. Legs blue-black, the femora yellowish toward 
base and beneath, the scales on the tibiae and basal tarsal joints 
of the hind legs raised, the last two joints snowy white. Wings 
smoky, with narrow dark scales. 
The larvae doubtless live in temporary ground pools, but unfor- 
tunately have not come under observation. 
Distribution—Southern United States. This is doubtless to be 
considered as a northern race of the tropical American Psorophora 
lutzit Theobald. 
United States Records. 
MARYLAND: Piummer Island, July 18, 1904 (R. P. Currie). 
DIstRicT oF CoLuMBIA: Washington, July 21, 1909 (T. Pergande). 
VIRGINIA: Woodstock, August 4, 1904 (F.C. Pratt). ° 
Texas: Dallas, June 24, 1904 (H. S. Barber). 
Brownsville, August 29, 1916 (M. M. High). 
MISSISSIPPI: Westpoint, August 11, 1904 (H. S. Barber). 
ARKANSAS: Vanburen, July 6, 1904 (H. S. Barber). 
TENNESSEE: Chattanooga, July 27, 1904 (H. S. Barber). 
Missourr: Charleston, June 13, 1918 (K. C. Sullivan). 
INDIAN TERRITORY: Wister, July 2, 1904 (H. S. Barber). 
We have no records of this species from the southern Atlantic 
States, though it occurs in the Potomac watershed. 
PSOROPHORA (JANTHINOSOMA) DISCRUCIANS Walker. 
Culex discrucians WALKER, Ins. Saund., p. 4380, 1856. 
Janthinosoma arribalzagae GiLtEs, Gnats, and Mosq., ed. 2, p. 339, 1902. 
Conchyliastes varipes CoquiLLeTT, Can. Ent. vol. 36, p. 10, 1904. 
A medium-sized blackish mosquito, bluish and silvery marked, a 
white ring before the tip of the hind legs. Mesonotum black scaled in 
the middle, yellowish silvery on the sides; head yellowish white 
scaled. Abdomen blue-black, with lateral whitish patches, apically 
situated on the segments, but running well toward their bases; venter 
yellowish, with broad black bands at the apices of the segments. Legs 
black-scaled, smooth, femora yellowish at base and beneath, the hind 
tarsi with the fourth joint white, the fifth black. Wings smoky, scales 
dark. 
The larvae occur in ground pools. A specimen was bred from a 
cacao husk. The life history is very imperfectly known. 
Distribution —Mississippi Valley, Mexico, and Central America, 
absent in the central Tropics, reappearing in southern Brazil and 
Argentina. It is possible that the northern form should be sepa- 
rated under the name Psorophora varipes Coquillett; but there is 
not sufficient material before us to make the necessary comparisons 
of all stages. 
