474 PROCEEDINGS OF THE NATIONAL MUSEUM vol. ne 



Nyctiophylax nephophiliis Flint, new species 



Figure 3, a-c 



In the material collected in the Southern Appalachians in 1961 

 were found a male and female that belong to an undescribed species. 

 The clasper of the male is quite different from that of any known 

 Nearctic species, but may be contrasted with vesfitus most readily. 

 From this species it differs in having the inner margin of the clasper 

 slightly convex, and the lateral process shorter and directed laterad. 



Adult. — Length of forewing, male 6 mm., female 8 mm. Color of 

 specimens in alcohol pale brown, wing membrane white around 

 thyridium, at r-m, and tip of Cu. Male genitalia (fig, 3,6,c): Tenth 

 tergmn semimembranous, elongate in lateral view. Cercus quadrate, 

 bearing a decm-ved process from mesal face. Clasper with apicomesal 

 point long, lateral point short, directed laterad, inner margin convex. 

 Female genitalia: Lobes of eight sternum short and wide. Tip of 

 abdomen with 3 pairs of short processes. 



Holotype male, allotype female: South Carolina, Oconee County, 

 Walhalla Federal Fish Hatchery, June 6, 1961, R. A. and O. S. Flint 

 (USNM type 66796). 



I attribute the following larvae to this species purely on circum- 

 stantial evidence — the adults were collected beside the stream in 

 which this larval form occurs. 



Larva. — Length 9 mm. Brown spot on head extending to anterior 

 margin along frontal sutm'es, but not extending much posterior to 

 frontoclypeus (fig. 3, a). 



Material. — South Carolina: E. Fork of Chattooga R., Walhalla 

 Federal Fish Hatchery, May 18, 1959, O. S, Flint, 6 larvae (OSF); 

 June 6, 1961, 14 larvae, 2 pupae (USNM); Sept. 11, 1958, 3 larvae 

 (OSF). North Carolina: Green's Cr., near Highlands, June 6, 1961, 

 O, S. Flint, 3 larvae, 1 prepupa, (USNM); Sept. 11, 1958, 1 larva 

 (OSF) ; stream, biological station, Highlands, July 1, 1958, O. S, Flint, 

 2 larvae, 1 pupa (OSF) ; Deep Cr., 2,000 ft., near Bryson City, June 7, 

 1961, O. S. Fhnt, 1 larva (USNM); Crabtree Meadows, Blue Ridge 

 Parkway, Sept. 2, 1959, O. S. Flint, 4 larvae (OSF), 



Remarks, — The larvae of this form are very similar to those of 

 vestitus, but the dark area on the head reaches the anterior margin 

 along the frontal sutures. 



The habits of the immature stages of this species seem to be the 

 same as recorded for vestitus, with the possible exception of their 

 inhabiting slightly smaller streams. 



