J. R. MALLOCH 279 



5. Mid metatarsus about ton times as long as its greatest diameter, the 



ventral bristles nearly erect, and almost as long as the diameter of the 



metatarsus spinitarsis Aldrich 



Mid metatarsus about eight times as long as its greatest diameter, the 

 ventral hairs directed apicad, not near as long as diam(»ter of meta- 

 tarsus alpicola Rondani 



6. Wings including the veins conspicuously yellow; mid femur with one 



short bristle near base and three to four near apex on antero-ventral 



surface nitens Stein 



AMngs hyaline or slightly smoky, the veins sometimes yellowish 7 



7. Mid femur with one to two strong bristles beyond middle on antero- 



ventral surface, which are distinctly stronger than any that may be 

 present near base of same surface; api('al joint of fore tarsi as wide as 



the preapical at its apex minor sp. n. 



Mid femur with a bristle near base on antero-ventral surface, which is 

 at least as strong as those near apex of same surface, the latter usually 

 closely placed; apical joint of fore tarsi distinctly broader than pre- 

 apical 8 



8. Apical join.t of fore tarsi but little dilated; mid femur with one to two 



weak bristles near base on antero-ventral surface, and four to five 



at apex which are nearly equal in length similis sp. n. 



Apical joint of fore tarsi much dilated; mid femur with one to two very 

 strong bristles near base and one to three much weaker bristles near 

 apex on antero-ventral surface aldrichi sp. n 



Pogonomyia alpicola Rondani 



1S77. Pogonomyia alpicola Rondani, Dipt. Ital. Prod., vi, 32. 



This species varies in the chaetotaxy of the thorax, having 

 three or four pairs of postsutural dorso-central bristles, differing 

 in this respect from most species of the subfamily in which the 

 number of these bristles is usually very constant. 



There are thirteen specimens in this collection which agree so 

 well with some examples of alpicola which I have from Europe 

 that I have no hesitation in accepting them as that species. 



Locality: Beidali, New Mexico, June 28, 1902, top of range. 

 Three males, ten females. 



Pogonomyia similis sp. n. 



This and the following three species belong, which nitens, Stein, 

 to Neopogonomyia, all four l)eing sui)mitte(l to me under the name 

 aterrima v. d. Wulp l)y Dr. Aldrich, and included in his paper as 

 such. In the paper i-eferred to is given a very full description of 

 the principal characters of llu^ tluoe species, including the color 



TEANS. AM. ENT. SOC, XLIV. 



