CADDIS FLY LARVAE—FLINT 487 
Remarks: Almost all the collections of this species were made in 
streams 5-10 yards wide, although a few larvae were collected in 
much smaller brooks. 
Larval data indicates that emergence takes place primarily in 
June. Adults of carpentert are generally taken in June, although in 
the mountains they linger well into August. Nearly fullgrown lar- 
vae have been taken in the late fall, winter, and early spring months. 
Rhyacophila species 3 
Ficure 10,a 
The distinctive larva of this form was collected only twice, both 
times in the same locality, Pinkham Notch, N.H. Species 3 is 
believed to be the larval stage of R. banksi Ross, which is an unreared 
member of the invaria group, and is known to occur rather commonly 
in Vermont and the White Mountains of New Hampshire. 
This larval form is easily recognized by the shape of the head, for 
no other species yet found in the east has a head capsule that gradu- 
ally narrows toward the rear. 
Description: Length,16mm. Head, uniformly yellow; head capsule 
widest at eyes, becoming distinctly narrowed on posterior third 
(fig. 10,a); second segment of maxillary palpus twice as long as first; 
left mandible with 2 apical teeth, right with 3 apical teeth, of which 
the mesal is longest (like fig. 11,0). Thorax, pronotum uniformly 
yellow; fore femora much broadened. Abdomen, anal prolegs with 
basoventral and apicolateral processes, neither free of membrane; 
claw with 1 minute ventral tooth. 
Material examined: New Hampshire, Pinkham Notch, Cutler 
River, May 18, 1957, 2 larvae—June 12, 1957, 3 prepupae. 
Remarks: The immature stages of this species were collected in a 
small (about 2-3 yards wide) cold mountain brook. The prepupae 
present indicate that emergence takes place in late June or July. 
Adults of banksi have been taken from late June to late July. 
Rhyacophila species 4 
Larvae of this form were taken at high altitudes in North Carolina. 
It would not be surprising if these are larvae of mycta Ross which 
occurs at the higher elevations in this area. The larvae may be 
recognized by the coloration and the slight widening of the head 
capsule posteriorly. It is very similar in coloration to the northern 
larvae of nigrita, but seems to have a proportionately broader head. 
Only one of the larvae was over 20 mm; the rest were 12-15 mm. 
Description: Length, 23 mm. Head, golden brown, becoming 
slightly darker anteriorly; head capsule slightly wider posteriorly; 
