August, 1944 



Ross: Caddis Flies of Illinois 



45 



Pupae 



1. Mandibles with a single, incised cusp 



below apical tooth, fig. 158 



Chimarra, p. 48 



Mandibles with 2 or 3 sharp teeth be- 

 low apical tooth, fig. 159 2 



2. Mandibles broad, subapical teeth 



close together, fig. 159 



Trentonius, p. 47 



Mandibles narrower, subapical teeth 



farther apart, figs. 160, 161 



Dolophilus, p. 45 



Adults 



1. Wings reduced to stubs, fig. 171 



Trentonius, p. 47 



Wings normal, reaching beyond apex 

 of abdomen, fig. 170 2 



2. Front tibiae with 1 apicalspur 



Chimarra, p. 48 



Front tibiae with 2 apical spurs 3 



Fig. 162. — Trentonius distincttis, front wing. 

 Fig. 163. — Dolophilus shawnee, front wing. 



3. Front wings with vein Rj-f-a branching 

 beyond radial crossveins, near mar- 

 gin of wing, fig. 162 



Trentonius, p. 47 



Front wings with vein R2-1-3 either 

 branching at or near radial cross- 

 veins, or not branched, fig. 163. . . . 

 Dolophilus, p. 45 



Dolophilus McLachlan 



Dolophilus McLachlan (1868, p. 303). Geno- 

 type, monobasic: Dolophilus copiosus McLach- 

 lan. 



Paragapetus Banks (1914, p. 202). Geno- 

 type, monobasic: Paragapetus moestus Banks. 



Dolophiliella Banks (1930^, p. 230). Geno- 

 type, by original designation: Dolophiliella 

 gabriella Banks. 



Of the nine described North American 

 species, only two have been taken in Illinois. 

 The remainder have been collected only as 

 far east as Oklahoma with the exception 

 of one species, major, which occurs in the 

 Great Smoky Mountains of North Caro- 

 lina and Tennessee. 



KEY TO SPECIES 

 Larvae 



1. Apex of fore coxae with a stout, curved 



spur, fig. 164 shawnee, p. 46 



164 



65 



Fig. 164. — Dolophilus shawnee larva, front leg. 

 Fig. 165. — Dolophilus moestus larva, front leg. 



Apex of fore coxae with a slender spur, 

 fig. 165 moestus, p. 47 



Adults 



1. Apex of abdomen with a pair of 2- 



segmented claspers (males) 2 



Apex of abdomen simple and tubular 

 (females) 3 



2. Claspers with basal segment short and 



bulbous, apical segment much longer 

 and spatulate; apico-mesal projec- 

 tion of seventh sternite short, fig. 



166 shawnee, p. 46 



Apical segment of claspers subequal in 



Fig. 166. — Dolophilus shawnee, male geni- 

 talia. Ay lateral aspect; B, ventral aspect. 



