DIPTERA— GOXOPIDxE. 555 



long wings with heavily ciliated costal niari^in, tlu^ auxiliary vein terminat- 

 ing just before the middle, and the first longitudinal vein not very far before 

 the tip; the other veins of the wing can not be determined. The legs are 

 pretty stout and densely haired. About the fly are scattered many arcuate, 

 tapering, spinous haii-s 0.7""" long, evidently the clothing of the thorax. 



Length of body, 4™"' ; breadth of thorax, 1.25"'" ; length of wings, 4'"°'(?); 

 of hind femora, 0.6""" ; hind tibia;, 1.25"""; hind tarsi, 1.25""" (?). 



Green River, Wyoming. One specimen, No. 48'' (F. C. A. Richardson). 



Family PLATYPEZID^E Loew. 

 CALLOMYIA Meigen. 



Callomvia torporata. 

 PI. 9, Fig. 11. 



A single specimen is preserved showing a dorsal view of the body 

 but with no distinct appendages excepting one wing which is imperfectly 

 figured on the plate. The tliorax is broad oval, and the abdomen oval, as 

 long as the head and thorax together, narrower than the thorax, tapering- 

 from in front of the middle backward, and rounded at the tip. The wing 

 is as long as the thorax and abdomen together. The third longitudinal 

 vein terminates at the tip of the vving, the first in the middle of the outer 

 half of the wing-, and the second midway between them ; the basal cells 

 are about one-third the length of the wing (indicated in the plate by the 

 angle in the fifth longitudinal vein), and the oblique posterior transverse 

 vein is situated at its upper extremity, about midway between the middle 

 basal cell and the apex of the wing. The exact length of the lower basal 

 cell can not be determined. 



Length of body, 3™™; of wing, 2.7"""; breadth of same, LI"'™. 



Green River, Wyoming. One specimen, No. 71 (Prof. Leslie A. Lee). 



Family CONOPIDyG Leach. 

 POLIOMYIA Scudder {ttoAk'?, juv'ia). 



Poliomyia ScnM., Bull. U. S. Geol, Geogr. Saw. Terr., IV, 754-755 (1878). 



This genus of Conopidje, mo.st nearly allied to \Tyopa, appears in the 

 neuration of the wings to resemble closely some genera of Syrphidse, espe- 

 cially Xylota and Milesia, but it altogether lacks the spurious longitudinal 



