arr. 1. MOSQUITOES OF THE UNITED STATES—DYAR. 57 
Culicelsa auroides Fett, Bull. 79, N. ¥. State Mus., p. 448, 1905. 
Aédes centrotus HowaArp, Dyar, and Knap, Mosq. No. & Cent. Am. & W. L., 
vol. 4, p. 747, 1917. 
A rather large blackish mosquito. Mesonotum with dark yellow 
or gray scales on the sides, a quadrate broad dark-brown band in 
the middle. Abdomen black, with basal segmental white bands, usu- 
ally narrow and narrowed eentrally; venter white scaled. Legs 
black, the femora white below. Wing scales wholly dark. 
In the East the mesonotum is commonly suffused with brown, 
with the dark central band still visible (form centrotus), to entirely 
dark brown (form adserratus). The latter is difficult to distinguish 
from intrudens. In the West the typical form (punctor=auroides) 
predominates, suffused examples being rare. Here the sides of the 
mesonotum are as often gray as yellow; in the East, always yellow. 
Another variation which occurs throughout the range, although not 
abundantly, has the median mesonotal stripe divided, forming two 
lines. This is very difficult to distinguish from lazarensis. Both 
the forms of diantaeus, also, closely resemble corresponding forms 
of punctor. This is, however, generally a larger and more robust 
mosquito than diantaeus, the legs less deep black. 
The winter is passed in the egg state, the larvae developing in 
early spring pools, particularly in spruce swamps. None were 
found in the flood pools referred to as breeding places for diantaeus 
and others. The adults are severe biters, and can be found till frost 
in the northern woods, although there is but a single annual 
generation. 
Distribution —Canadian forests from Atlantic to Pacific, except 
the rainy Pacific belt; mountains of New England and New York, 
northern Minnesota, but not the Rocky Mountains. 
United States Records. 
WISCONSIN: Saxeville, May 28, 1909 (B. K. Miller). 
MINNESOTA: Minneapolis, July 6 (K. Taylor). 
NEw HAmpsSHIRE: Dublin, May, 1909 (A. Busck). 
MASSACHUSETTS: Mount Tom, May 6. 1903 (F. Knab). 
New York: Plattsburg, April, 1905 (H. G. Dyar). 
AEDES (HETERONYCHA) LEUCONOTIPS Dyar. 
Aédes leuconotips Dyar, Ins. Ins. Mens., vol. 8, p. 24, 1921. 
A rather large blackish mosquito. Mesonotum brownish yellow, 
with two median dark-brown lines and short posterior lateral one of 
the same color. Abdomen black, with basal segmental white bands, 
narrow and narrowed centrally; venter white scaled, with some 
black ones at the tips of the segments. Legs black, the femora white 
below; knee spots narrowly white. Wing scales all dark. 
