288 DIPTERA FROM SOUTHWESTERN UNITED STATES 



Schoenomyza aurifrons sp. n. 



Male. — Black, densely covered with olive-gray pruinescence. Back of 

 head with olive-gray pruinescence, frons, face, and cheeks with golden brown 

 pruinescence; antennae black, apex of second joint and inner and outer sur- 

 faces of third on upper half with silvery white pruinescence; proboscis glossy 

 black; palpi j^ellow. Dorsum of thorax not vittate. Abdomen with a small 

 pair of black spots on dorsum of second visible segment, and a larger pair on 

 dorsum of third and fourth which are glossy black. Legs black. Wings 

 slightly milky, both cross-veins broadly infuscated. Calyptra white. Hal- 

 teres yellow. 



Frons gently rounded in profile, distinctly over half as wide as head at 

 vertex, much narrowed anteriorly; cephalic chaetotaxy similar to that of pre- 

 ceding species, but there is no bristle above vibrissa in type. Chaetotaxy 

 of thorax and legs as in preceding species, the wings noticeably broader, with 

 venation differing as indicated in key to species, and the apices of third and 

 fourth veins more noticeably convergent. Length, 2.5 mm. 



Type. — cf ; Mexico City, Mexico, [Coll. Illinois]. 

 Schoenomyza chrysostoma Loew 



1869. Schoenomyza chrysostoma Loew, Berl. Ent. Zeit., xiii, 177. (Cent., ix, 

 86.) 



There are a number of specimens of both sexes amongst the 

 material which I consider referable to this species, although the 

 face of the male is not black, showing only a gradual darkening 

 towards base of antennae. In one of my Illinois specimens I 

 find the same variation from type. 



Localities: Cloudcroft, New Mexico, June 16 and 20, 1902, 

 three specimens; Highrolls, New Mexico, May 29, 1902, one 

 specimen; East Las Vegas, New Mexico, June 24, 1902, one 

 specimen; top of Las Vegas range, Beulah, New Mexico, June 

 28, 1902, five specimens. 



Schoenomyza dorsalis Loew 



1872. Schoenomyza dorsalis Loew, Berl. Ent. Zeit., xvi, 95. (Cent., x, 73.) 



There is one male in the material which agrees in all particulars 

 with specimens from Illinois, except that the thoracic dorsum is 

 not so distinctly vittate, but the specimen has been damaged 

 slightl}^ so that the difference may be due to that fact. 



Locality; Beulah, New Mexico, June 28, 1902, top of range. 



Schoenomyza dorsalis var sulfuriceps var. n. 



Male. — .Similar in color to dorsalis Loew except that the face is entirely 

 sulphur yellow, and not or but little darker than the cheeks, and the antennae 

 are broalh' reddish yellow a'>o e. In other respects it agrees very closely with 



