114 



Illinois Natural History Survey Bulletin 



Vol. 23. Art. 1 



We have only two widely separated rec- 

 ords of this species for the state, one along 

 the Kaskaskia River, the other along the 

 Kankakee. 



Other records from Georgia, Indiana, 

 Kentucky, North Carolina, Pennsylvania, 

 Tennessee and Wisconsin indicate that the 

 main range of the species centers in the 

 eastern states with a preference for rapid 

 streams, and that our isolated records from 

 Indiana, Wisconsin and Illinois are on the 

 extreme western edge of the range. 



Illinois Records. — Momence, Kankakee 

 River: May 26, 1936, H. H. Ross, 3S. 

 Venedy Station, along Kaskaskia River: 

 Aug. 27, 1940, Mohr & Riegel, 1 S . 



C heumatopsyche lasia Ross 



Cheumatopsyche lasia Ross (1938fl, p. 154); 

 cf, 9. 



Adults. — Length 7 mm. Color brown, 

 the wings with very fine, uniform and 

 irrorate markings over the entire wing. 

 Male genitalia, fig. 399: claspers with api- 

 cal segment long, similar to those of cam- 

 pyla ; tenth tergite with apical lobes pro- 

 duced into a wide, projecting, basal shoul- 

 der, the apical portion curved back against 

 the tenth tergite and provided with a heavy 

 brush of setae at the apex. 



This species has been taken fairly widely 

 throughout the state, usually along small 

 streams, although occasionally taken along 

 rivers such as the Rock. Many of the 

 streams in which it is found are fairly 

 heavily silted; it is interesting to note in 

 this connection that to the southwest the 

 species has been taken in abundance along 

 heavily silted rivers. Adult emergence ex- 

 tends from May to August with a decided 

 high peak toward July and August. 



The range, fig. 12, extending to the south 

 and west of Illinois, includes Illinois, Kan- 

 sas, Missouri, Oklahoma and Texas; in 

 addition we have a record from eastern 

 Montana which indicates that the species 

 might be fairly widespread in the relatively 

 uncollected Great Plains area. 



Illinois Records. — Many males and fe- 

 males, taken May 15 to August 31, are from 

 Amboy (Green River), Bartonville (Kick- 

 apoo Creek), Deer Grove, Dixon, Downs 

 (Kickapoo Creek), Elgin (Botanical Gar- 

 dens), Kappa (Mackinaw River), Ma- 

 homet, Milan, Oak Hill (Kickapoo Creek), 



Pontiac, Quincy (Burton Creek), Ripley, 

 Serena (Indian Creek), Springfield, Spring 

 Grove, White Pines Forest State Park, 

 Wolf Lake. 



Cheumatopsyche speciosa (Banks) 



Hydropsyche speciosa Banks (1904^, p. 214); 

 &, 9. 



Adults. — Length 7-8 mm. Head brown, 

 wings brown with irregular, fine, light mot- 

 tling and three large light spots as follows: 

 a pair on the anterior and posterior mar- 

 gins just before the stigma, and the third 

 on the anterior margin just beyond the stig- 

 ma, sometimes the three marks running to- 

 gether. Male genitalia, fig. 397: claspers 

 with apical segment long, very narrow, 

 pointed, and curved at apex; apical lobes 

 of tenth tergite sharply angled near middle, 

 the apical portion recurved down and back 

 along the tergite and then curved dorsad 

 again, the whole giving the appearance of a 

 pair of sharp, apical projections and a pair 

 of preapical, somewhat hairy lobes. 



We have taken this species at several 

 scattered localities in northern Illinois and 

 at one locality along the Wabash River in 

 southern Illinois; this last record probably 

 represents drifts from a nearby large colony 

 at Shoals, Indiana. Our only large Illinois 

 collections have been made at Momence, 

 along the Kankakee River; here the species 

 emerges in swarms. It has a marked prefer- 

 ence for large rivers. The adults emerge 

 from April until early September. 



The species has a wide range, occurring 

 through the eastern states, extending to the 

 southwest through the Ozarks and to the 

 northwest through Minnesota to Montana. 

 We have records from Arkansas, Indiana, 

 Kentucky, Maryland, Minnesota, Missouri, 

 Montana, New York, Ohio, Oklahoma, 

 Tennessee and Wisconsin. 



Illinois Records. — Many males and fe- 

 males, taken May 17 to September 7, are 

 from Champaign, Dixon, Kankakee (Kan- 

 kakee River), Metropolis, Momence (Kan- 

 kakee River), Mount Carmel, Putnam, Sa- 

 vanna, Urbana, Wilmington. 



Macronemum Burmeister 



Macronema Pictet (1836, p. 399). Geno- 

 type, monobasic: Macronema lineatum Pictet. 

 Preoccupied. 



Macronemum Burmeister (1839, p. 915). 

 Emendation. 



