62 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL. 62. 
domen black, with basal segmental straight white bands; venter 
whitish. Wing scales all dark but the costa, first and third veins 
distinctly darker than the others. Legs black, whitish below, the 
femora largely white; knee spots white. 
The winter is passed in the egg state, the larvae developing :n 
the flood pools of rivers. The eggs must he on the ground for 
years awaiting suitable water. In New Jersey the larvae were ob- 
served to develop in pools which had not been water filled for 12 
years. The eggs, of course, may not have been there that long, al- 
though it is possible that they were. The adults are found in woods 
near the rivers where there have been floods. The species is related 
to, and possibly a race of, the European A. sticticus Meigen. 
Distribution.—Eastern United States from the Gulf of Mexico to 
southern Canada, through the Potomac Gap into Virginia and 
northward. 
United States Records. 
Texas: Paris, April 4, 1904 (A. A. Girault). 
INDIAN TERRITORY: Wister, July 3, 1904 (H. S. Barber). 
ARKANSAS: Scott (J. K. Thibault). 
Missourr: East Prairie, June 17, 1918 (H. V. Rosa, jr.). 
TENNESSEE: Rives, July 27, 1904 (H. 8S. Barber). 
Memphis, April 30, 1920 (B. Mayne). 
SourH Daxotra: Fort Snelling, June 10, 1906 (EH. B. Frick). 
VirGINIA: Woodstock, June 2, 1903 (F. C. Pratt). 
MaryLanp: Herzogs Island, April 26, 1903 (W. V. Warner). 
NEw JERSEY: Great Piece Meadow, April 27 (J. B. Smith). 
ConnNEcTIcUT: Hartford, April 25, 1905 (Dyar and Knab). 
MASSACHUSETTS: Westfield, July 14, 1903 (F. Knab). 
New HampsHiIreE: Dublin, June, 1905 (A. Busck). 
AEDES (HETERONYCHA) AESTIVALIS Dyar. 
Culex aestivalis Dyar, Journ. N. Y. Ent. Soc., vol. 12, p. 245, 1904. 
A rather small dark-gray mosquito. Mesonotum dark brown in 
the middle, gray on the sides and over the antescutellar space. Ab- 
domen black, with basal segmental straight white bands; venter 
whitish. Wing scales all dark, but the costa, first and third veins 
distinctly darker than the others. Legs black, whitish below, the 
femora largely white; knee spots white. 
The winter is passed in the egg state, the larvae developing in the 
flood water of Jakes. This is probably a synonym of hirsuteron, 
originally separated on supposed larval differences and western distri- 
bution, but the characters have lately been shown to be without value. 
Distribution.—V icinity of lakes in the northern Rocky Mountains, 
Idaho to British Columbia. 
United States Records 
Ipauo: Sand Point, July 3, 1917 (H. G. Dyar). 
MontTANA: Belton, June 23, 1921 (H. G. Dyar). 
