84 
Psyche 
[April 
One or two fronto-orbitals, humeral and presutural bristles 
well developed; mesopleurse bare; pygidium pendant 
and extending forward under abdomen, the sixth seg- 
ment superior; back part of cheeks shining, no pollinose 
vertical stripe beneath the eyes. Genotype P. luteata 
Hal . Subgenus A llopiophila Hendel 9 . 
3. Scutellum flattened and microscopically roughened; front 
entirely black and devoid of pubescence; veins thin and 
pale. (Eur.; N. Am.) nigriceps Meigen. 
Scutellum convex and smooth; front more or less yellow or 
red 4 . 
4. Front coxae yellow 5 . 
Front coxae entirely black; femora black except knees, 
front tibiae blackish, their tarsi black 8 , 
5. Venter of male heavily hairy; sixth abdominal segment 
large and convex; posterior legs in large part black; 
upper half of front black; hind metatarsi subequal to 
remaining joints together 6 . 
Venter with short sparse hairs; sixth abdominal segment 
of male not strongly convex; hind metatarsi shorter 
than remaining joints together; front yellow quite to 
the vertex 7 . 
6. Halteres yellow. (Eur.; Mass., Ont., Wash.) Meigen. 
Halteres tipped with black. ( Wash. ).q^ms, vsiY.halterataM.,,S, 
7. Posterior legs yellow: cheeks, antennae, base of arista and 
mouthparts yellow (N. U. S., B. C.) . .prmgna, n., sp. 
Posterior legs in large part black; cheeks, antennae, arista 
and mouthparts piceous. (Wash.) . . . .morator n. sp. 
8 Mouthparts, cheeks, face, half of front and antennae yellow- 
ish; halteres entirely yellow. (Mont., Id., Wash.) 
nigricoxa M., 3. 
Mouthparts, cheeks, face and antennae black, anterior half 
of front deep reddish: halteres with blackened tip. 
(111.) occipitalis M.,S. 
9. Front coxae yellow; yellow of front continuing as an M- 
shaped mark to vertex; at least posterior fronto-orbital 
strong 10. 
