42 
Psyche 
[Apri 1 
DESCRIPTIONS OF A FEW NEW AMERICAN DIPTERA 
By Nathan Banks, 
Museum of Comparative Zoology, Cambridge, Mass. 
Stratiomyia occidentis sp. nov. 
Related to S. maculosa , the male having pilose eyes and a 
black face. It differs from S. maculosa most prominently in 
lacking oblique yellow marks on the fourth segment, and the 
lateral marks are narrow, almost linear. The lateral appendages 
of the male genitalia are very much broadened at tip, about 
twice as broad as in middle, whereas those of S. maculosa are 
scarcely broadened at tip. The hair on the eyes is much shorter 
than that of maculosa and white (not yellowish). The hair on 
face and thorax is also whiter than in maculosa ; the scutellum is 
about half yellow, the marks on the fourth segment do not ap- 
proach each other, the fifth segment shows but one spot, much 
broadened behind; the venter is largely yellow, but black on 
base or lateral parts of segments; femora black, rest of leg tawny. 
Length 15 mm. 
The type is from Stockton, Utah, June (Spaulding), two 
other smaller males from Webber Lake, Calif., July (Osten 
Sacken.) 
Odontomyia tumida sp. nov. 
In general similar to 0. arcuata in coloration and structure; 
the head yellow, with black mark over ocelli, and a curved dark 
mark each side in front from the eye, basal joint of antennae 
pale; thorax rather more silvery pubescent above than in arcuata, 
pleura and sternum yellow, latter black in middle, legs wholly 
pale, the tarsi hardly darker near tip, scutellum yellow with 
short yellow spines; abdomen yellow above with four black 
bands, narrower than in arcuatus, and none of them reaching to 
the margin. It is distinguished from arcuatus by the profile of 
the face, which is fully twice as much swollen out beneath an- 
tennae as in arcuatus , projecting forward the width of the eye; 
