arr. 1. MOSQUITOES OF THE UNITED STATES—DYAR. 51 
is perhaps to be considered as a northern race of the tropically dis- 
tributed Aédes scapularis Rondani. There are certain larval dif- 
ferences between the two, which if directly contrasted seem marked ; 
but the Central American form (ewplocamus Dyar and Knab) is 
intermediate. The colorational characters given to separate these 
in the monograph are not constant. 
Distribution —Southern States. 
United States Records. 
Texas: Brownsville, August 31, 1916 (M. M. High). 
Lovutstana: New Orleans, September 15, 1914 (W. V. King). 
Mound, October 13, 1918 (D. L. Van Dine). 
ARKANSAS: Scott, August 31, 1908 (J. K. Thibault). 
Froriwa: Cutler, November 10, 1921 (G. F. Moznette). 
West Tampa, March 18, 1905 (H. G. Dyar). 
Bartow, March 20, 1905 (A. N. Caudell). 
Homestead, March 12, 1917 (C. A. Mosier). 
NortuH Carotina: Charlotte, 1920 (H. P. Barret). 
AEDES (HETERONYCHA) TRIVITTATUS Coquillett. 
Culex trivittatus CoquitterT, Journ. N. Y. Ent. Soe., vol. 10, p. 193, 1902. 
Culex inconspicuwus GrossBEcK, Ent. News, vol. 15, p. 333, 1904. 
Aédes angustivittatus DYAR and Knap, Journ. N. Y. Ent. Soc., vol. 15, p. 
9, 1907. 
A medium-sized to small brown mosquito. Mesonotum brown, 
with two rather broad yellow lines the whole length. Head largely 
yellow scaled. Abdomen black with basal segmental lateral white 
patches; venter white. Legs black, the femora white beneath ; tibiae 
and first tarsal joint also more or less whitish below. Wing scales 
all dark. Proboscis black. 
The larvae live in ground pools, particularly in river valleys where 
the pools are filled by flood water. They also occur sparingly in irrl- 
gation water. The adults frequent the bushes and trees along the 
river bottoms, and will bite severely persons going to such places. 
The form with narrow yellow lines on the. mesonotum (angusti- 
vittatus) is probably not separable specifically, though as yet insufli- 
ciently known. It occurs commonly in Panama but also with the 
normal form. 
Distribution—Panama to the upper Mississippi Valley, through 
the Potomac Gap to Virginia, and north to Maine. 
United States Records. 
New Mexico: South Fork Deer Creek Canyon, Peloncillo Mountains, July 27, 
1917 (C, H. T. Townsend). 
TExAS: Denison, June 14, 1904 (H. S. Barber). 
Camp Stanley, May 24, 1918 (D. L. Van Dine). 
