78 
Psyche 
[April 
REVIEW OF THE DIPTEROUS FAMILY PIOPHILIDiE.i 
By a. L. Melander. 
Pullman, Washington. 
In 1917 in collaboration with Anthony Spuler I published 
a taxonomic study of the Piophilidse in Bulletin 143 of the 
Washington Agricultural Experiment Station. This work was 
undertaken in order to facilitate identification in this group of 
insects many of which are of concern to man owing to their 
unsanitary habits of frequenting garbage. In the meantime 
additional collecting has brought to light several undescribed 
species which are herewith described together with some notes 
on the taxonomy of Piophila and a rectification of the identity 
of P. pusilla. 
Key to the Species of Mycetaulus. 
Thorax whoUy reddish yellow, or almost entirely so; abdomen 
more or less blackened 2 . 
Body almost wholly black; wings uniformly subhyaline 7 . 
2. Occiput brownish; wings more than three times as long as 
broad; pectus, metanotum and an anterior spot on meso- 
notum sometimes blackish. (Can.; E. U. S) 
longipennis Loew 
Head yellowish or rufous; wings three times as long as 
wide 3 . 
3. Anterior crossvein distinctly beyond middle of discal cell . . .4 . 
Anterior crossvein located near middle of discal cell 6 . 
4. Costal cell blackened; ocellar area concolorous with head.. . 5 . 
Costal cell hyaline; ocellar area black (E. U. S.) 
pulchellus Banks 
5. Costal area narrowly black from root of wing to tip, the 
apical spot excised in submarginal cell. (Or.) . xostalis, n.sp. 
Costa not centrally blackened, the apical spot somewhat 
triangular. (Eur.; W. U. S.) bipunctatus Fallen 
^Contribution from the Zoology Laboratory of the State College of 
Washington. 
