86 
Psyche 
[April 
but sparse and pale, bristles weak. Humeral, presutural and 
sternopleural bristles undeveloped, prothoracic bristle weak; 
hairs of meso- and sterno-pleurse present, propleurse heavily 
pruinose. Abdomen bluntly elliptical, ventral hairs short and 
sparse, pygidium retracted, cleft on right side. Front coxae 
yellowish, posterior coxae piceous, legs piceous except the yellow- 
ish knees and posterior tarsi. Halteres nearly white. Wings 
hyaline, veins pale. 
Holotype, Pullman, Washington, May. 
Piophila privigna, n. sp. 
Male. Length 3 mm. Front light yellow up to the vertex, 
the small ocellar triangle and the uppermost orbits black, oc- 
ciput shining black, its lower sides with a white pruinose stripe 
extending from the eyes to the oral margin, face, cheeks, mouth- 
parts and antennae light yellow, arista brown, paler at base; 
cheeks broad, at middle one-third and at pruinose stripe one- 
half the eye-height; interfrontal hairs sparse and yellow, ocellar 
and postvertical bristles small, no fronto-orbitals. Thorax 
polished black with bluish lustre, no humeral, presutural or 
sternopleural bristles, notal pubescence uniform, meso- and 
sternopleurae with scattering hairs, scutellum convex, prothoracic 
bristle small, propleurse heavily pruinose. Abdomen polished 
black with blue lustre, the sixth segment displaced so that the 
retracted pygidium appears cleft, ventral hairs short and sparse. 
Legs light yellow, the distal two-thirds of front femora black 
and the distal three-fourths of front tibiae brown. Halteres 
whitish. Wings hyaline, veins pale yellow. 
Female. Front tarsi black. 
Types, four males and eight females; Woods Hole, and New 
Bedford (Hough) Mass.; Cold Spring Harbor, N. Y.; Chicago, 
111.; Sheridan (Metz), Wyo.; Potlatch, Ida.; Pullman, Colfax, 
Ilwaco, Wash.; Nelson, B. C.: July and August. This is the 
species recorded as P. pusilla in Bulletin of the Washington 
State Agricultural Experiment Station No. 143, p. 61., under 
which name the other specimens there listed have been distributed 
among collections. I have taken the real pusilla at Olympia, 
Wash. 
