art. 1. MOSQUITOES OF THE UNITED STATES—DYAR. 31 
1, Clasper branched; process from the angle of excavation of sidepiece long, 
swollen at tip, with short inserted rod_----- Subgenus Mansonia Blanchard. 
Clasper simple; process short, at least shorter than the rod, not swollen at tip. 
Subgenus Coquillettidia Dyar. 
KEY TO THE UNITED STATES SPECIES OF MANSONIA, 
1. Hind tibia with a white ring beyond the middle____------ perturbans Walker. 
uindetibia: withoutaswhiter pings == a eee titillans Walker. 
Subgenus COQUILLETTIDIA Dyar. 
MANSONIA (COQUILLETTIDIA) PERTURBANS Walker. 
Culex perturbans WALKER, Ins. Saund., Dipt., p. 428, 1856. 
Culex ochropus Dyar and Knap, Journ. N. Y. Ent. Soc., vol. 15, p. 100, 1907. 
A rather large mosquito with scaly wings and conspicuously 
ringed legs. Proboscis with many pale scales in the middle, the base 
and tip dark. Mesonotum with rather coarse pale golden scales, 
imperfectly covering the surface. Abdomen brown, with a few pale 
scales at the bases of the segments and triangular whitish spots at the 
sides; venter pale scaled, with blackish ones toward the apices of the 
segments. Legs dark, with pale scales intermixed, the femora and 
tibiae pale beneath, the hind tibia with a pale ring at outer third; 
tarsi with broad white rings at the bases of the joints, the first joint 
also with a white ring in the middle. Wings with the scales dense 
and rather broad, brown with white ones intermixed. 
The larvae are attached to the roots of a species of Carex growing 
in marshes or the edges of ponds. The winter is passed as half- 
grown larva. The adults fly several miles from the breeding 
grounds and are severe biters. They have been known to descend 
unused chimneys to get into dwellings which were otherwise screened. 
Distribution.—North America, Florida to Canada, westward in 
timbered country to British Columbia. 
United States Records. 
MAINE: Lincolnville, August, 1908 (H. G. Dyar). 
New HAMPSHIRE: Center Harbor, August, 1902 (H. G. Dyar). 
MASSACHUSETTS: Springfield, June 7, 1903 (F. Knab). 
Connecticut: Brandford, June 4, 1904 (H. L. Viereck). 
New York: Ithaca, July 14, 1891 (J. H. Comstock). 
New Jersey: Delair, July 9, 1901 (W. P. Seal). 
MaryLAnpD: Lakeland, August 8, 1895 (F. C. Pratt). 
District or CoLtuMBIA: Washington, August, 1906 (T. Pergande). 
Vircinta: Lake Drummond, June 11, 1905 (H. S. Barber). 
Norru Carotina: Plymouth, June 8, 1910 (N. C. Dept. Agriculture). 
GrorciA: Myrtle, May 19, 1906 (A. A. Girault). 
FiLoripa: Lake Okeechobee, March, 1906 (J. H. Egbert). 
Lovutstana: New Orleans, May 2, 1901 (H. A. Veazie). 
ARKANSAS: Little Rock, July 11, 1904 (H. S. Barber). 
Missour1: St. Louis, August, 1904 (A. Busck). 
