486 PROCEEDINGS OF THE NATIONAL MUSEUM VoL. 113 
larva, 1 prepupa; near Highlands, Greens Creek, May 19, 1959, 
2 larvae, 3 prepupae, 9 o'2 pupae; Blue Ridge Parkway, milepost 
251, May 22, 1959, 1 prepupa, 3 pupae. New York, Slaterville 
Springs, Wildflower Preserve, tributary to Sixmile Creek, Apr. 12, 
1959, 1 larva—June 7, 1958, 2 & pupae—Nov. 13, 1960, 3 larvae. 
Remarks: All the larval collections of this species were made in 
small brooks, less than a yard wide, that have a rather low gradient. 
The adults were collected from late May into July. The collecting 
of well-grown larvae in late fall and early spring indicates that the 
species overwinters in the larval stage and transforms to pupae from 
May through June. 
Rhyacophila species 2 
Ficure 9,b. 
Larvae of this species have been collected in Massachusetts, New 
Hampshire, New York, and North Carolina. Because adults of 
carpentert Milne have been taken in the same general area, in fact in 
several cases in the same locality, species 2 is believed to be the larval 
stage of this species. The species carpenteri is recorded from Mas- 
sachusetts, New Hampshire, North Carolina, Quebec. 
The larva is very distinctive; it is the only species in the invaria 
group in which the head and pronotum have such a well-marked 
color pattern. 
Description: Length, 20 mm. Head, deep reddish brown, pale 
yellow around eyes, and posteriorly; muscle scars pale, conspicuous, 
with a large pale central spot on frontoclypeus; head capsule long, 
and nearly parallel sided (fig. 9,6), maxillary palpus with second 
segment twice length of first; left mandible with 2 apical teeth, right 
with 3 apical teeth, mesal one being longest (like fig. 11,b). Thorax, 
pronotum deep brown, with conspicuous pale muscle scars, and pale 
posterolateral quarter; fore femora much broadened. Abdomen, 
anal prolegs with basoventral and apicolateral processes, neither free 
of membrane; claw with 1 large and 1 minute ventral tooth (like 
fig. 8,b). 
Material examined: Massachusetts, Amherst, Fort River, April 
1951, 1 prepupa—Jan. 26, 1954, 1 larva; North Amherst, Cushman 
Brook, May 3, 1954, 3 prepupae. New Hampshire, Twin Moun- 
tain, Ammonoosuc River at Zealand Campground, June 11, 1957, 1 
prepupa, 1 pupa. New York, near DeBruce, Willewemoc River, 
2 larvae, 2 prepupae, 4 pupae; Rockland, Beaverkill, Apr. 4, 1959, 
14 larvae—Dec. 6, 1959, 6 larvae; Slaterville Springs, Wildflower 
Preserve, tributary of Sixmile Creek, Apr. 12, 1959, 1 larva—Nov. 13, 
1960, 1 larva (USNM). North Carolina, Bryson City, Deep Creek 
at campground, Sept. 13, 1958, 1 larva. 
