CADDIS FLY LARVAE—FLINT 485 
The long parallel-sided head of the larva separates this species from 
others in the znvaria group, except for species 2 which has a dis- 
tinctive color pattern on the head and pronotum. The larva is 
similar in many respects to that of species 4, but seems to have a 
longer, more nearly parallel-sided head capsule. 
Description: Length, 14mm. Head, nearly uniform black (south- 
ern) or golden brown (northern), slightly paler around eyes and 
posteriorly on frontoclypeus; head capsule long and parallel sided 
(fig. 9,4), second segment of maxillary palpus twice length of first, 
Ficure 9.—Rhyacophila nigrita: a, head and pronotum, dorsal aspect. R. species 2: b, 
head and pronotum, dorsal, 
left mandible with 2 apical teeth, right with 3 apical teeth, mesal 
one longest (like fig. 11,6). Thorax, pronotum brownish yellow, 
darker on anterior fourth; fore femora much broadened. Abdomen, 
anal proleg with short basoventral and apicolateral processes, neither 
free of membrane; claw with second small ventral tooth (like fig. 8,6). 
Material examined: Georgia, Rabun County, Black Rock Mountain 
State Park, July 3, 1958, 3 prepupae, 8 2 pupae. North Carolina, 
Highlands, Biological Station, July 1, 1958, 1 & pupa—July 4, 1958, 1 
