476 PROCEEDINGS OF THE NATIONAL MUSEUM VoL. 113 
The association of stages is based on male metamorphotypes col- 
lected in New Hampshire. The larvae of this species and minora 
are very similar, as would be expected from the similarity of the 
adults. The larvae of manistee however, may be recognized by the 
slightly greater length of the head capsule, which bears darkened 
muscle scars, and by the presence of only 1 or 2 dark setae antero- 
laterally on the pronotum. 
Description: Length, 12mm. Head, brownish yellow, muscle sears 
slightly darker than ground color (fig. 5,c); head capsule slightly 
longer than broad, closely set with spicules arising from a darkened 
spot in the integument; second segment of the maxillary palpus 1% 
times as long as the first; left mandible with 2 apical teeth, right 
with 1 mesal tooth and 3 apical teeth, the ventral tooth longest 
(like fig. 5,6). Thorax, pronotum brownish yellow, immaculate; 
anterolateral angles with 1 or 2 dark setae in addition to corner 
setae; fore femora much widened. Abdomen, anal prolegs with baso- 
ventral hook and with a short apicolateral process attached to 
membrane; claw without ventral teeth (fig. 5,d). 
Material examined: New Hampshire, Twin Mountain, Ammonoo- 
suc River at Zealand Campground, May 18, 1957, 1 larva, 3 prepupae— 
June 11, 1957, 2 &@ 1 9 pupae. New York, Rockland, Beaverkill, 
Apr. 4, 1959, 1 larva. 
Remarks: The larvae of this species inhabit the wider (5-10 yards) 
clear cold streams with alternate long pools and riffles: the fly- 
fisherman’s ideal trout stream. This habitat is quite distinct from 
that of minora. 
Adults are a spring form, known from Michigan in May (Leon- 
ard and Leonard, 1949) and from New Hampshire in June. The 
larva collected in late April is fully grown and indicates that the 
species must overwinter as grown larvae. 
Rhyacophila melita Ross 
FIGURE 6,a,b 
Rhyacophila melita Ross, 1938a, p. 104 (male genitalia). 
This species, previously recorded only from Michigan, also occurs 
in New Hampshire and New York. 
A single male metamorphotype collected in New York establishes 
the identity of the larva. The larvae of melita are the most strik- 
ing of any species in the genus yet encountered in the east. The 
combination of black bands on the body segments and the striking 
color pattern on the head and pronotum are distinctive. 
