art. 1, MOSQUITOES OF THE UNITED STATES—DYAR, Th 
after sunset close in the tops of smail pine trees. The females bite 
by day or night, whenever one comes into their haunts. 
Distribution —Utah and northward, very local, but usually abunc- 
ant where it occurs. 
United States Records. 
ALASKA: Skagway, June, 1919 (H. G. Dyar). 
Urau: Elsinore, August 6, 1907 (EH. S. G. Titus). 
Garfield, May 6, 1920 (H. G. Dyar). 
Montana: Glasgow, July 15, 1921 (H. G. Dyar). 
Norru DaxKora: Niles Siding, July 16, 1921 (H. G. Dyar). 
Devils Lake, July 17, 1921 (H. G. Dyar). 
MiInnESoTA: East Grand Forks, July 24, 1921 (H. G. Dyar). 
AEDES (HETERONYCHA) CANADENSIS Theobald. 
Culex canadensis THEOBALD, Mon. Culic., vol. 2, p. 8, 1901. 
Culex nivitarsis CoQuILLETT, Proc. Ent. Soc. Wash., vol. 6, p. 168, 1904. 
A medium-sized, dark-brown mosquito, with conspicuously ringed 
tarsi. Mesonotum dark brown, with more or less distinct paired 
narrow light-golden lines. Abdomen commonly unbanded dorsally, 
black, with triangular white lateral spots at the bases of the seg- 
ments; venter whitish scaled. Legs black, the femora whitish be- 
neath; tarsi with white rings involving both ends of the joints, 
broader on the hind tarsi, the last hind tarsal all white. Wing 
scales wholly dark. 
The winter is passed in the egg state, the larvae developing in 
transient ground puddles, open woods pools and roadside ditches. 
The larvae will appear several times in a season, following succes- 
sive filling of the pools by rain, but this probably does not indicate 
more than one annual generation, only that some of the eggs did 
not hatch at the first filling of the pool. The adults are persistent 
biters, being fond of attacking low, near the ground. The males 
swarm after sunset. 
Distribution —Gulf States to southern Canada, westward in the 
warmer timbered country to British Columbia. 
United States Records. 
Froripa: Orange City Junction, March 20, 1905 (Dyar and Caudell). 
Jacksonville, March 2, 1905 (Dyar and Caudell). 
SoutH CAROLINA: Hartsville, June 25, 1901 (W. C. Coker). 
NortH CAROLINA: Wilmington, March 4, 1919 (M. Kisliuk, jr.). 
Vircinta: Mount Vernon, April 29, 1908 (W. V. Warner). 
KENTUCKY: Corbin, August 24, 1908 (H. S. Barber). 
MARYLAND: Bladensburg, June 17, 1903 (F. C. Pratt). 
PENNSYLVANIA: Shenks Ferry, October 14, 1901 (S. E. Weber). 
New Yorx: Ithaca, May 4, 1903 (O. A. Johannsen). 
MASSACHUSETTS: Cummington, May 30, 1903 (F. Knab). 
