August. 1944 



Ross: Caddis Flies of Illinois 



111 



thus substantiating observations from our 

 few Illinois records. The species usually 

 occurs in small, local colonies. 



The range of the species apparently covers 

 most of the northeastern deciduous forest 

 region with extensions westward through 

 the Ozarks. We have records from Arkan- 

 sas, Georgia, Illinois, Michigan, New York, 

 North Carolina, Tennessee and West Vir- 

 ginia. 



Illinois Records. — Herod: July 11, 1935, 

 Ross & DeLong, 1$. Springville: Roar- 

 ing Spring Outlet, Oct. 17, 1938, Ross & 

 Burks, \ $ , 19, many larvae. Utica: Split 



Rock Brook, June 17, 1941, Burks & Rie- 

 gel, U. 



Cheumatopsyche aphanta Ross 



Cheumatopsyche aphanta Ross (1938a, p. 



151); &, 9. 



Adults. — Length 7-9 mm. Color dark 

 brown, the wings with a few indistinct, 

 grayish, scattered spots and a large gray 

 spot on the anal margin near apex. Male 

 genitalia, fig. 401 : clasper with apical seg- 

 ment long, curved, slender, and pointed at 



/^^l 



LASIA 



Figs. 404-413. — Cheumatopsyche, ninth and tenth tergites, females. A, lateral aspect; 

 5, dorsal aspect; C, caudal aspect showing lateral invaginations. 



