45 
Novembe 24 (Pratt); District of Columbia, July, October 15, November 2 and 
14 (Pergande); Illinois, September 10, October 10 (Nason); St. Anthony Park, 
Minn., December 11 (Lugger); Tick Island, Fla., May 12 (Johnson); Texas 
(Nat. Mus. ); Oneco, Fla., May 26 (Gossard); Roanoke, Va., October (Thayer); 
Newport News, Va., October (Thayer); St. Elmo, Va., April, May, June, July 
(Pratt); New Orleans (Thayer); Sparrows Point, Md.,and vicinity (Thayer 
and Lazear); Middletown, Conn. (Davis). 
THE GENUS PSOROPHORA. 
But one species, P. celiata, of the genus Psorophora is known in 
the United States. This is well illustrated in the accompanying 
figure (fg. 20). Although this insect, as indicated in the synoptic 
: Fie. 20.—Psorophora ciliata: Female—enlarged (original). 
tables, is really yellowish in color, yet the general effect when one 
glances at it, or sees it flying, is that it is very dark, almost black. 
The wings are not really spotted or infuscated, but the very numerous 
dark scales on the main veins make the wings appear dark. They are 
also when seen in certain lights prismatic in color effect. The palpi 
of the female are nearly half as long as the beak, and the beak itself 
