CADDIS FLY LARVAE—FLINT 479 
America. In eastern North America angelita is known to occur only 
in New Hampshire. 
The larvae are easily recognized by the combination of an apicolateral 
spur on the anal prolegs and a dark transverse band on the genae. 
Description: Length of prepupa, 13 mm. Head, yellow with a 
brown transverse band posteriorily on the genae; ‘few pale inconspic- 
uous muscle sears in this band (fig. 6,¢); second segment of maxillary 
palpus twice as long as first ; mandibles worn, but probably like those of 
torva. Thorax, pronotum yellow on anterior half, pale brown on 
posterior; femora of forelegs shghtly broader than those of other legs. 
Abdomen, anal proleg with basoventral hook and apicolateral spur; 
claw with 1 small ventral tooth (fig. 6,d). 
Material examined: New Hampshire, Mount Washington, Cutler 
River in Tuckermans Ravine, Aug. 4, 1958, 1 prepupa, 1 pupa— 
Aug. 24, 1957, 2 2 pupae. 
Remarks: The specimens were collected from a tumbling mountain 
torrent of about 3-5 yards width. ‘They were associated with larvae 
of acropedes. ‘The emergence period is in late August; the rest of the 
life cycle is unknown. 
Rhyacophila acropedes Banks 
Ficure 7 
Rhyacophila acropedes Banks, 1914, p. 201.—Ross, 1938b, p. 4 (male genitalia). 
This species like angelita, has a wide range in western North America 
and is also found in northeastern area; it has been found in Labrador, 
Maine, Michigan, New Hampshire, and New York. 
The association of stages is based on mature male metamorphotypes 
taken in New Hampshire, as well as on determined larvae lent by Ross. 
The larvae are immediately recognizable by the clusters of bushy 
gills on the abdomen; no other eastern species possess gills. 
Description: Length, 21 mm. Head, yellow brown, with darker 
muscle scars; paler on posterior quarter, this area sharply set off from 
darker anterior portion; posterior half of frontoclypeus darker along 
sutures (fig. 7,c); second segment of maxillary palpus twice as long as 
first; left mandible with 2 apical teeth, right with 2 apical teeth and a 
large mesal tooth (fig. 7,a). Thorax, pronotum yellow brown, 
slightly darker anteriorly; muscle scars slightly darker posteriorly; 
fore femora much broadened. Abdomen, clusters of branching gills 
present laterally on segments 1-8; first segment with 1 pair, eighth 
segment with 2 pairs, 2-7 with 3 pairs; each cluster with 12-15 fila- 
ments. Anal prolegs with a basoventral hook; claw with 1 large and 
1 small ventral tooth (fig. 7,5). 
