August, 1944 



Ross: Caddis Flies of Illinois 



233 



elongate, with a small, round, basal portion 

 bearing a short cone of stout setae near 

 apex, the tergite beyond this prolonged into 

 a slender neck bearing a small hoodlike por- 

 tion at tip; claspers with basal segment 

 large, with an angular ventro-mesal elonga- 

 tion, the apical segment fairly long, the 

 mesal process slender and curved. Female 

 unknown. 



This species was originally described from 

 two specimens collected at Elizabethtown, 

 Illinois, and since then only one other male 

 has been found, from Hoopeston in the east- 

 central part of the state. No generalizations 

 can be made about either its distribution or 

 habitat preference. 



Illinois Records. — Elizabethtown: 

 June 22, 1927, at light, Frison & Glasgow, 

 23. Hoopeston: July 14, 1940, at light, 

 J. S. Ayars, 1 S . 



Athripsodes transversus (Hagen) 



Leptocerns transversus Hagen (1861, p. 279); 

 cf , 9. 



Leptocerns maculatus Banks (1899, p. 214); 

 9. 



Larva. — Fig. 767. Length 6 mm. Head 

 yellowish brown with indistinct lighter spots. 

 Mesonotum and legs straw colored. Para- 

 frontal areas nearly as wide as frons. Pro- 

 notum with evenly spaced hairs along an- 

 terior margin. Mesonotum with only two or 

 three pairs of hairs, the lateral tufts com- 

 posed of three to four hairs, the sclerotized 

 bars narrow but fairly sharply angled. 

 Ninth tergite with two pairs of long black 

 setae. Anal legs with a fairly long, sclero- 

 tized dorsal bar. 



Case. — Length 8 mm., horn shaped and 

 constructed of sand grains, these generally 

 irregular in size and shape, giving a more 

 or less rough external appearance to the 

 case itself. 



Adults. — Length 10 mm. Color varying 

 from bright reddish brown to lighter or 

 darker shades of brown. Male genitalia, 

 fig. 790: cerci fairly long, pointed at apex; 

 tenth tergite with somewhat bulbous base 

 and finger-like apex; claspers with basal seg- 

 ment short, provided with a short, stout 

 ventral projection, apical segment long and 

 straight, mesal process slender and much 

 shorter than apical segment. Female geni- 

 talia, fig. 797: ninth sternite sloping abrupt- 

 ly mesad from base, the mesal portion form- 

 ing a tonguelike rounded lobe, the sloping 



portion marked by a distinct invagination; 

 bursa copulatrix somewhat elliptic. 



This species has been taken throughout 

 the state, chiefly along the larger rivers and 

 streams. The larvae were reared from 

 Indian Creek and Nippersink Creek. The 

 span of adult emergence is wide, from May 

 to early September. The larvae are gen- 

 erally found under stones. 



The range of the species is wide, extend- 

 ing from the eastern states southwestward 

 to Texas and northwestward to Minnesota, 

 with records from the following: Arkan- 

 sas, District of Columbia, Georgia, Illinois, 

 Indiana, Iowa, Kentucky, Minnesota, Mis- 

 souri, New Brunswick, Ohio, Oklahoma, 

 Pennsylvania, Tennessee, Texas and Wis- 

 consin. 



Illinois Records. — Many males, females 

 and pupae, taken May 17 to September 

 11, and many larvae and seven cases, taken 

 May 17 to August 12, are from Alton, Bar- 

 tonville (Kickapoo Creek), Cairo, Charles- 

 ton, Council Hill (Galena River), Dixon, 

 Elgin (Botanical Gardens), Erie (Rock 

 Creek), Hamilton, Hardin, Havana, Kamps- 

 ville, Kankakee (Kankakee River), Lyndon, 

 Mahomet (Sangamon River), Milan (Rock 

 River), Momence (Kankakee River), Mor- 

 ris, Mount Carmel, Ottawa, Pontiac, 

 Quincy, Rock Island, Savanna, Serena (In- 

 dian Creek), Spring Grove (Nippersink 

 Creek), Venedy Station (Kaskaskia River), 

 Wadsworth (Des Plaines River), Yorkville 

 (Fox River). 



Athripsodes cancellatus (Betten) 



Leptocerns cancellatus Betten (1934, p. 256); 



d", 9. 



Larva. — Length 6 mm. Head, pronotum 

 and legs creamy white, the head with an 

 indefinite light brownish pattern. Para- 

 frontal areas nearly as wide as frons. Pro- 

 notum with a thick line of setae along an- 

 terior margin, the setae including long and 

 short ones. Mesonotum with only three or 

 four pairs of setae in addition to lateral 

 tuft which consists of only two or three 

 hairs. 



Case. — Length 8 mm., horn shaped, the 

 main structure composed of fairly regular 

 sand grains arranged in a somewhat fenes- 

 trate pattern, a few larger grains arranged 

 along the side, giving very slightly the ap- 

 pearance of a lateral extension. 



