434 ENTOMOLOGICAL NEWS [Dec., '14 



Dorsum of the abdomen dark brown or black, sometimes the hind 

 margins of the first and second segments pale; venter yellowish, in 

 some specimens almost brown; hairs of the abdomen and the bristles 

 on the hind margins of the first, second and fifth segments black; 

 hypopygium and its appendages reddish-brown (Fig. 4). 



Coxae pale yellow, fore pair with minute black and several long but 

 extremely delicate pale hairs on the front surface, and black bristles 

 at tip; middle pair with black hairs and bristles near the tip in front; 

 hind coxse with a minute black bristle on the outer surface; legs yel- 

 low or yellowish-brown, femora paler especially at base ; tarsi growing 

 darker towards their tips ; hind legs rather hairy ; hairs on the femora 

 mostly yellow; fore metatarsi three-fourths as long as their tibiae; 

 hind tarsi with the second joint longer than the first. 



Halteres yellowish-brown with brown knobs; tegulae yellow with 

 their tips and cilia black, the cilia however appear yellowish-brown in 

 certain lights. 



Wings grayish hyaline; veins brown; costa black; last segment of 

 the fifth vein about twice as long as the posterior cross-vein; third 

 and fourth veins parallel beyond the cross-vein; tip of the fourth vein 

 beyond the apex of the wing (Fig. i). 



Described from four males taken at Golden, Erie County, 

 New York, August 3. 



This species differs from all other known North American 

 species in having the antennae and the cilia of the tegulae and 

 orbit black, also in having the knob of the halteres and the tips 

 of the tegulae infuscated. It resembles N. dorsalis described 

 in this paper in the color of the abdomen and pleurae, also in 

 size. The hypopygium of these two species when drawn out 

 appears to be attached by a slender peduncle ; N. setosa V. D. 

 has about the same structure. 



Neurigona dorsalis n. sp. (Plate XVIII, Fig. 3). 



$ . Eyes contiguous ; thorax metallic green or purple on the dor- 

 sum; flattened space before the scutellum not very conspicuous; 

 hypopygium yellow, tipped with black; front tibiae with black bristles. 

 Length 2 mm. 



Eyes meeting so as to almost obliterate the face; palpi with silvery 

 white pollen ; proboscis yellow ; front blackish with gray pollen ; ocellar 

 bristles strong, divergent. Antennse yellow, first joint with a few black 

 bristly hairs above at apex, second joint short, third joint pointed, 

 about as long as broad, infuscated along the upper edge; arista brown- 

 ish, pubescent. 



Dorsum of the thorax metallic green (in the type specimen reddish 

 purple on the most of its surface), dulled with gray pollen; pleurae 



