August, 1944 



Ross: Caddis Flies of Illinois 



113 



Cheumatopsyche hurksi Ross 



Cheumatopsyche bnrksi Ross (1941/^, p. 83); 

 cf , 9. 



Adults. — Length 9-10 mm. Color brown, 

 the wings with abundant light flecks over 

 the entire surface and with two fairly large 

 white areas along the anal margin, one at 

 the end of the anal veins, the other near 

 the junction of the anal veins. Male geni- 

 talia, fig. 398: claspers with apical segment 

 short, the caudal view with base wide and 

 apex narrow and finger-like, the mesal mar- 

 gin straight, the segment in general some- 

 what triangular; tenth tergite long, the 

 apical lobes short and lanceolate, armed with 

 fairly long setae. 



Our only record of this species in Illinois 

 is the holotype male, taken at Havana, along 

 the Spoon River, October 2, 1938, B. D. 

 Burks. The only other record of the species 

 is from Tavares, Florida; hence little can 

 be said regarding the general range of the 

 species. 



Cheumatopsyche campyla Ross 



Cheumatopsyche campyla Ross (1938c/, p. 

 152); c^, 9. 



Adults. — Length 10-12 mm. Color 

 brown, wings irrorate with light brown and 

 cream and with a large light spot on the 

 anal margin near apex ; the irrorate portion 

 is irregularly marked. Male genitalia, fig. 

 402: claspers with apical segment long and 

 pointed but much shorter than in oxa or 

 aphanta; tenth tergite fairly long, the apical 

 lobes appearing somewhat clavate at apex 

 from side view, and shouldered and pointed 

 from caudal view; in some specimens this 

 shoulder is more pronounced than in fig. 

 402. 



This species is distributed very widely 

 over Illinois. It seldom frequents small 

 streams, preferring those at least as large 

 as the Salt Fork at Oakwood. It is fre- 

 quently taken in large numbers along the 

 Illinois, Rock and Mississippi rivers. Adult 

 emergence covers a wide span, from April 

 to October. As mentioned under analis, 

 this species is frequently found in streams 

 which are quite unattractive to most caddis 

 flies. The larval head is illustrated in fig. 

 414. 



This species also has a very wide range. 

 It is most abundant through the Corn Belt 



states but is found over almost all other 

 parts of the continent, with records from 

 Arkansas, Georgia, Idaho, Illinois, Indiana, 

 Iowa, Kansas, Michigan, Minnesota, Mis- 

 souri, Montana, New Mexico, New York, 



Fig. 414. — Cheumatopsyche campyla larva, 

 head. 



Ohio, Ontario, Oregon, Pennsylvania, Tex- 

 as, Utah, Wisconsin and Wyoming. 



Illinois Records. — Many males and fe- 

 males, taken April 11 to October 11, are 

 from Algonquin, Alton, Beardstown, Byron, 

 Carmi (on bridge across Little Wabash 

 River), Charleston, Danville (Middle Fork 

 River), Deer Grove (Green River), Des 

 Plaines, Dixon, Dundee, East Dubuque, 

 Elgin (Botanical Gardens), Fieldon, Flor- 

 ence, Grafton, Grand Detour, Grand Tow- 

 er, Hamilton, Hardin (Illinois River), 

 Harrisburg, Havana, Homer, Horse Shoe 

 Lake, Jerseyville, Kampsville, Kankakee 

 (Kankakee River), Kappa (Mackinaw Riv- 

 er), Keithsburg, Mahomet, McHenry, Me- 

 redosia, Momence, Montezuma, Morris, 

 Mount Carmel, New Boston, Oakwood, 

 Oregon, Ottawa, Pearl, Pontiac, Quincy 

 (stream near Cave Spring), Richmond, 

 Rockford, Rock Island, Rockton, St. 

 Charles, Savanna, Serena (Fox River), 

 Springfield, Spring Grove (Nippersink 

 Creek), Starved Rock State Park, Sterling, 

 Urbana, Valley City, Waukegan, Wilming- 

 ton, Yorkville. 



C heumatopsyche pasella Ross 



Cheumatopsyche pasella Ross (1941^, p. 84); 



cf , 9. 



Adults. — Length 7-9 mm. Color dark 

 brown with very few light spots. Male 

 genitalia, fig. 403: claspers with apical seg- 

 ment long and sinuate, pointed at apex. 

 Lobes of tenth tergite very long, angled 

 dorso-caudad, appearing narrow and point- 

 ed from lateral view, from caudal view 

 pointed but with the base widened. 



