232 



Illinois Natural History Survey Bulletin 



Vol. 23, Art. 1 



Illinois, Indiana, Minnesota, New York, 

 Ohio, Ontario, Quebec and Wisconsin. 



Illinois Records. — Antioch : May 18, 

 1938, Ross & Burks, 3S, 1$ (reared in 

 cage at Spring Grove). Channel Lake: 

 May 27, 1936, H. H. Ross, 3 5,45. Chi'- 

 CAGO: July 13, 1931, roof of Stevens Hotel, 

 T. H. Prison. 8 <? , 9 9 ; July 8, 1939, G. T. 

 Riegel, 5 (? , 7 $ . Fox Lake: May 15, 1936, 

 Ross & Mohr, from stones, 7 pupae; May 

 28, 1936, H. H. Ross, 2$. Grayslake: 

 May 26. 1936, H. H. Ross. 1 $. North of 

 Wadsworth, Des Plaines River: July 7, 



1937, Prison & Ross, 19. Waukegan : 

 Aug. 25, 1932, Ross & Mohr, 1 S ; July 16, 



1935, Ross & DeLong, 6 S , 9 9; May 25, 



1936, H. H. Ross, 1 9 ; July 7, 1937, at 

 light, Prison & Ross, $ S , 9 9; Aug. 15, 



1938, Ross & Burks, 6 9 . Zion : Dead Riv- 

 er, July 7, 1937, Prison & Ross, 4(5, 9 9; 

 June 4, 1938, Ross & Burks, 1 9 ; Aug. 15, 

 1936, Ross & Burks, 1 9 . 



Athripsodes annulicornis (Stephens) 



Leptocerus annulicornis Stephens (1836, p. 

 199); d^, 9. 



Leptocerus lugens Hagen (1861, p. 276); d^, 

 9. 



Leptocerus recurvatus Banks (1908/^, p. 265); 



Leptocerus Jutilis Banks (1914, p. 264); c^. 

 Athripsodes perplexus nordus Milne (1934, 

 p. 15); cf. 



Not yet collected in Illinois, but a possible 

 addition with future collecting. The range 

 of the species covers the Holarctic region 

 with North American records from Alaska, 

 Colorado, New York, Ontario, Oregon, 

 Quebec and Wisconsin. 



Athripsodes mentieus (Walker) 

 Leptocerus mentieus Walker (1852, p. 71); 



Leptocerus vanus Betten (1934, p. 262); d^, 

 9. 



Leptocerus mentiens auct., misspelling. 



Larva.— Pig. 763. Length 6.5-7.0 mm. 

 Head, pronotum and legs brownish yellow, 

 the head with an irregular brown pattern. 

 Parafrontal areas as long as frons, the three 

 meeting at base of epicranial stem. Meso- 

 notum relatively hairy with at least 20 pairs 

 of hairs in addition to lateral tufts, and with 

 sclerotized bars fairly wide. Ninth segment 

 with two pairs of long black setae. 



Case. — Pig. 810. Length 10 mm., horn 

 shaped and markedly curved; constructed of 

 flattened sand grains cemented together to 

 form an even and fenestrated exterior. 



Adults. — Length 10 mm. Color dark 

 brown, the tarsi ringed with white. Male 

 genitalia, fig. 787: cerci short and ovate; 

 tenth tergite stout, the apical portion long 

 and expanded into a broad hood; claspers 

 with basal segment large, produced into a 

 mesal triangular lobe, the apical segment 

 short and curved, the mesal process wide 

 at base, fairly long and tapering to a sharp 

 point. Pemale genitalia, fig. 805 : ninth 

 sternite only indistinctly sclerotized; bursa 

 copulatrix oval and attached by a pair of 

 sclerotized ribbons. 



Our collections of adults have resulted 

 in only a few scattered Illinois records of 

 this species distributed from the extreme 

 north to the extreme south end of the state. 

 Bottom fauna collections made by R. E. 

 Richardson show that in 1924-27 the larva 

 of this species was an abundant midstream 

 feature for almost the entire length of the 

 Rock River. These Rock River collections 

 have established the association of the larva 

 and adults. Collections of adults and pupae 

 indicate that emergence occurs from late 

 June through August. 



The few records available from Illinois, 

 New York, Ontario and Wisconsin indicate 

 the species to be distributed through the 

 Northeast. 



Illinois Records. — Many males, four fe- 

 males and many pupae, taken June 15 to 

 August 7, and many larvae and cases, taken 

 May 11 to August 29, are from Byron 

 (Rock River), Como (Rock River), Dixon 

 (Rock River), Erie (Rock River), Grand 

 Detour, Grand Tower, Hamilton, Harris- 

 burg, Keithsburg, Love's Park (Rock Riv- 

 er), Lyndon (Rock River), Nelson (Rock 

 River), Oregon (Rock River), Prophets- 

 town (Rock River), Rockton, Sterling 

 (Rock River). 



Athripsodes ophioderus Ross 



Athripsodes ophioderus Ross (1938rt, p. 157); 

 &. 



Larva. — Unknown. 



Adults. — Length 10 mm. Color reddish 

 brown, the wings with a few indistinct whit- 

 ish spots. Male genitalia," fig. 786: cerci 

 short but pointed at apex ; tenth tergite 



