180 



Illinois Natural History Survey Bulletin 



Vol. 23, Art. 1 



longer if well marked, and with R2 

 less sharply curved or straight, figs. 

 633, 636. .' 14 



10. Wings transparent, colorless and glassy 



with definite solid brown markings, 

 fig. 630; veins and membrane with 

 very short, sparse hair; cord follow- 

 ing a zigzag course. 



Chilostigma, p. 199 



Wings either mostly brown, or with 

 abundant hair on veins or mem- 

 brane; cord more regular, as in fig. 

 631 11 



11. Apical margin of front wings deeply 



incised and with cell Cuib very nar- 

 row, long and parallel-sided, fig. 



6315 Glyphopsyche, p. 200 



Apical margin not incised; cell Cuib 

 narrowing gradually for most of its 

 length, fig. 631^, C 12 



12. Front wings with cord aligned with 



base of stigmatic area, fig. 631D. . . 



Frenesia, p. 199 



Front wings with cord not forming a 

 line with base of stigma, fig. 631y/, 

 C 13 



13. Front wings with apex of R2 almost 



633 



fusing with apex of stigma, fig. 631C 



Grensia, p. 201 



Front wings with Rs paralleling stigma 

 and definitely not approaching it, 

 fig. 631 v^ Glyphopsyche, p. 200 



14. Front wings with fork of R2-I-3 much 



basad of fork of Rj-f-s, at least as 

 much as in fig. 632, and last tarsal 

 segment of all legs without black 



spines 15 



Either front wings with fork of Rz-fa 

 more nearly on a level with fork of 

 R4-J-5, fig. 636, or last tarsal segment 

 of at least 1 or 2 legs with 1 or more 

 short black ventral spines 16 



15. Hind tibiae with 2 spurs; small, slen- 



der species about 10 mm. long 



Ironoquia, p. 184 



Hind tibiae with 4 spurs; large, robust 



species about 15 mm. long 



Caborius, p. 196 



16. Front wings as in fig. 633, with Ri sin- 



uate and upcurved at apex to de- 

 limit a stigmatic area, and R2 close 

 to and parallel with Ri from base of 

 stigma; wing very long and narrow; 

 last tarsal segments never with 



black spines Psychoglypha, p. 201 



Front wings either very wide or with 

 R2 following Ri no closer than in 

 fig. 636; note that R2 does not follow 

 Ri at base of stigma; last tarsal seg- 

 ments sometimes with 1 or 2 black 

 spines 17 



17. Hind wings with Rs bordered with a 



- Limnephilidae Front Wings 



Fig. 632. — Caborius kaskaskia. 

 Fig. 633. — Psychoglypha avigo. 

 Fig. 634. — Drusinus uniformis. 

 Fig. 635. — Pycnopsyche subfasciata. 

 Fig. 636. — Limnephilus submonilifer. 

 Fig. 637. — Neophylax autumnus, hind wing 

 Fig, 638. — Grammotaulius sp., hind wing. 



