CADDIS FLY LARVAE—FLINT 471 
overwinters in this stage. Other overwintered larvae have been 
taken in the spring; these would produce the late-season adults. 
Rhyacophila lobifera Betten 
Figure 3,a,b 
Rhyacophila lobifera Betten, 1934, p. 131 (male and female genitalia, larva and 
pupa).—Ross, 1944, p. 35 (male and female genitalia, larva and pupa). 
This species is apparently restricted to the central states: Illinois, 
Indiana, Ohio, and Oklahoma. 
The description is based on determined material from the Betten 
and the Illinois Natural History Survey collections. The larvae are 
Ficure 3.—Rhyacophila lobifera: a, head and pronotum, dorsal aspect; b, anal proleg, 
lateral. R. glaberrima: c, head and pronotum, dorsal; d, anal proleg, lateral. 
