BUFFALO SOCIETY OF NATURAE SCIENCES 189 



32 Diaphorus palpiger Wheeler. 



Diaphorus palpiger Wheeler, Psyche, June, 1890, p. 360. 



Male: Length 2.75 mm. Eyes widely separated by the 

 front ; palpi as long as the face, glistening white with golden 

 yellow bases ; antennae small, black ; arista subapical. Thorax 

 and abdomen golden green ; abdomen less golden than the thorax 

 which has a thick layer of yellow dust ( in the specimens I have 

 seen the dust is more gray than yellow). Coxae and tarsi black; 

 femora and tibiae greenish black, shining ; knees yellow. Halters 

 and tegulae yellow, the latter with yellow cilia. Wings grayish 

 hyaline ; first vein reaching more than one-third of the distance 

 to the tip of the second vein. 



Described from Milwaukee County, Wis. ; I took a specimen 

 at Toronto, Ont., August 8th, and another at Lewiston, N. Y., 

 May 30th ; Prof. J. M. Aldrich sent specimens from Viola, Idaho, 

 and Wells, Nev. ; there were three specimens in the Cornell 

 University collection material, one taken at Fulton, Cal., May 

 15th ; one from Revelstake, Colo., July 1st, taken by J. C. Bradley ; 

 and one without locality label which has a coppery vitta on the 

 dorsum of the thorax. I cannot detect any difference in these 

 western specimens except that the palpi are less yellow at base 

 and the pollen on the thorax is more gray. 



33 Diaphorus triangulatus n. sp. 



Male: Length 2.5 mm. Face broad, longer than wide, cov- 

 ered with silvery pollen ; palpi large, fully one-half as long as the 

 face, nearly oval, about as wide as long, somewhat pointed at tip, 

 pale yellow with silvery pollen ; front bright green with the pollen 

 of the face extending a little above the antennae on the sides ; 

 antennae black, third joint large, somewhat triangular, as long as 

 the two basal joints (Fig. 7) •; arista inserted above the point of 

 the third joint ; cilia of the laterial and lower orbits white. Thorax 

 and abdomen metallic green, sometimes with coppery reflections, 

 the former with a little gray pollen along the front and sides of 

 the dorsum ; hairs of the abdomen brown on the dorsum and 

 white on the venter, bristles at the tip small, scarcely noticeable ; 

 hypopygium small, its appendages also small. Coxae black, fore 

 pair with white hairs on the front surface ; femora metallic green 

 with yellow tips, the usual row of hairs on the lower outer edge 



