NOTES ON NEARCTIC PSYCHOMYIIDAE — FLINT 



475 



Figure 3. — a-c,Nyctiophylax nephophilus: a, head, dorsal aspect; b, male genitalia, lateral; 

 c, male clasper, caudal. N. species A: d, head and pronotum, dorsal. 



Nyctiophylax species A 



Figure 3,d 



Cyrnus pallidus (?), Noyes, 1914, p. 263 (misidentification) . 

 Genus a Ross, 1944, p. 73; 1959, p. 1032. 



This larva may be that of A^. uncus Ross, which has the same gen- 

 eral distribution, or of some presently unrecognized member of the 

 genus. 



Larva. — Length 9 mm. Brown area on genae broadly joined 

 posterior to frontoclypeus, and ^vith conspicuous pale muscle scars and 

 a large pale spot centrally on frontoclypeus (fig. 3,d). 



Material. — Ontario: La Vase R., 1 mile NW. of La Vase L., 

 near North Bay, Sept. 24, 1957, S. S. Roback, 12 larvae (ANSP). 

 Wisconsin : Namekagon R., Spooner, June 5-6, 1936, Frison and Ross, 

 1 larva (INHS). Michigan: Platte R., Honor, Sept. 16, 1936, Ross 

 and Burks, 3 larvae (INHS); Big Sable R., N. of Scotville, Sept. 16, 

 1936, Ross and Burks, 2 larvae (INHS); power dam on Au Sable R., 



