August, 1944 



Ross: Caddis Flies of Illinois 



177 



3. Gills arising singly, fig. 613 4 



Gills arising in groups ot two or more 5 



4. Seventh abdominal tergite with an 



antero-mesal gill; postero-lateral cor- 

 ner of mesonotum with a linear 



black mark Astenophylax, p. 183 



Seventh abdominal tergite with no 

 antero-mesal gill; postero-lateral cor- 

 ner of mesonotum with either a spot 



or no black mark, as in fig. 20 



Pycnopsyche, p. 193 



5. Pronotum with dense, short black 



spines, especially anterior margin, 



fig. 608; legs banded with red and 

 black, fig. 612. , . Glyphopsyche, p. 200 



Pronotum without dense black spines, 

 clothed primarily with long setae, 

 fig. 607; legs not so banded 6 



Anal legs with a group of about 10 

 setae on the bulbous ventral portion 

 Frenesia, p. 199 



Anal legs with no setae on bulbous 

 ventral portion 7 



Dorsal gills of first few abdominal seg- 

 ments with 6-12 branches forming a 

 fanshaped spread, figs. 615, 616. ... 8 



Fig. 606. — Neophy/ax autumnns larva, tho- Fig. 612. — Glyphopsyche missouri larva, 



rax. legs. A, front leg; B, hind leg. 



Fig. 607. — Frenesia missa larva, thorax. Fig. 613. — Pycnopsyche subjasciata larva, 



Fig. 608. — Glyphopsyche w/jio«r/ larva, tho- abdominal gill. 

 rax. Fig. 614. — Limnephilus submonilijer larva, 



Fig. 609. — Neophylax autumnus larva, head. abdominal gill. 



Fig. 610. — Frenesia missa larva, head. Fig. 615. — Hesperophylax designatus larva, 



Fig. 611. — Dicosmoecus sp. larva, legs. /I, abdominal gill, 

 front leg; B, hind leg. Fig. 616. — Caborius sp. larva, abdominal 



gill. 

 Fig. 617. — Glyphotaelius sp. larva, head and 

 pronotum. 



