300 DIPTERA FROM SOUTHWESTERN UNITED STATES 



strongly curved hairs invading the cheek caudad of the vibrissal angle; 

 vibrissa not stronger than the other eight to nine hairs in the series with it; 

 antennae shorter than face, third joint one and one-half times as long as 

 second, arista almost bare; face concave in profile, mouth margin protruded 

 further than frons at base of antennae. Thorax with long erect hairs, the 

 bristles longer than the hairs, but not very strong; presutural acrostichals 

 represented by about six series of slender erect hairs; postsutural dorso-cen- 

 trals three; prealar weak; sternopleura and mesopleura posteriorly and the 

 area just above fore coxa with dense long hairs, the sternopleural bristles 

 hardl}' distinguishable. Abdomen subovate, with dense, erect long hair 

 laterally. Legs normal; fore tibia with one antero-dorsal and one posterior 

 bristle; mid femur with very short setulose hairs on basal half of antero- 

 ventral surface, and seven to nine long, slender bristles on basal half; mid 

 tibia with one antero-ventral, one antero-dorsal, three postero-dorsal, and two 

 postero-ventral bristles; hind femur wdth a continuous series of very long 

 bristles on antero-ventral surface, and another series of shorter bristles on 

 postero-ventral surface which become very short near apex; hind til)ia with 

 one short antero-ventral bristle, a series of rather closely placed short setulose 

 hairs (13 to 15) extending from base to near apex on antero-dorsal surface, 

 and three long bristles on postero-dorsal surface. Apical sections of veins 

 3 and 4 decidedly convergent at apices; outer cross-vein oblique, not very 

 much curved; costal thorn minute. Length, 5.5 mm. 



Type. — cf ; Beulah, New Mexico, June 28, 1902, top of range, 

 [A. N. S. No. 6210]. 



This species closely resembles mystacea Coquillett, but differs 

 in having an antero-ventral mid tibial bristle, the short bristles on 

 antero-dorsal surface of hind tibia more numerous, and only 

 three bristles on postero-dorsal surface of that tibia. 



PEGOMYIA R.-D. 



I have placed in this genus five species in this collection, 

 two of which are new. The last three species are placed here 

 provisionally. 



The lower calypter is protruded distinctly beyond upper in 

 both species. This character alone is not sufficient for generic 

 separation, but, until I am in a position to publish reliable dis- 

 tinguishing characters for this and allied genera, the present 

 arrangement is the best available. 



Pegomyia hyoscyami Panzer 



1809. Musca hyoscyami Panzer, Faun. Germ., cviii, 13. 



One female specimen of this species from Beulah, New Mexico, 

 June 28, 1902, top of range. 



