NOTES ON XEARCTIC PSYCHOMYIIDAE — FLINT 



479 



Figure 5. — a,b, Psychomyia flavida: a, anterior margin of frontoclypeus; b, mandibles, 

 dorsal, c-e, P. nomada: c, head, dorsal; d, mandibles, dorsal; e, anal claw, lateral. 

 Tinodes: f, mandibles, dorsal. Polyceniropuj cinereus: g, mandibles, dorsal. 



1961, O. S. Flint, 2 larvae, 4 prepupae, 2c^ 49 pupae (OSF); Thornton 

 R., above Sperryville, Apr. 15, 1961, O. S. Flint, 3 larvae (USNM); 

 Jefferson National Forest, 5 miles east of Buchanan, June 19-20, 1961, 

 A. B. Gurney, many cf 9 (USNM). 



Remarks. — The larvae of this species are much like those of P. 

 flavida, but differ in the conspicuous projections from the fronto- 

 clypeus, and the differently shaped mandibles. 



The habits of this species are apparently similar to those of Nyctio- 

 phylax, with which they are found. The larval shelter is considerably 

 smaller, however, as one would expect from their comparative sizes. 



Psychomyia flavida Hagen 



Figure 5, a,b 



Psychomyia flavida Hagen, 1861, p. 294. — Ross, 1938b, p. 14 (designates lectotype) ; 

 1944, p. 75 (male, female, larva). 



This species is widespread over eastern North America and as 



