1895. PROCEEDINGS OF THE NATIONAL MUSEUM. 437 



SYNECHES HYALINUS, new species. 



Female. — Opaque black; base of abdomen yellowish; antenuie and 

 knob of lialteres yellowish brown; jiroboscis and legs yellow; cox;e, 

 trochanters, and tips of tarsi, black; wings hyaline; stigma pale 

 grayish; marginal cell beyond apex of lirst vein nearly twice as wide 

 as the snbmarginal cell at the same point. 



Type. — No. 324:0, U.S.N.M. ; length, 5 mm. A single specimen captured 

 by the writer. 



Locality. — Maryland. 



Genus HYBOS, Meigen. 



ANALYTICAL KEY TO THE SPECIES OF HYBOS. 



Knob of halteres yellowish, eyes widely separated on the face, proboscis horny, rigid, 

 longer than height of head, under side of first two joints of hind tarsi provided 

 with short black spines : 



Wings hyaline to discal cell, the remainder brown rerersus. 



Wings, except the stigma, wholly hyaline mlossontv (p. 4.37). 



HYBOS SLOSSONiE, new species. 



Male and female. — Head, including the antennte, proboscis, and palpi, 

 black; face broad, whitish i)ollinose; proboscis slender, rigid, slightly 

 longer than height of head, only slightly longer than the palpi. Tho- 

 rax black, shining, lightly pollinose, the pile rather long, yellowish 

 white ; pleura black, subshining, lightly pollinose, no long pile in front 

 of halteres; scutelluni black, subshining, bearing two long yellowish 

 apical bristles and several shorter ones. Abdomen black, shining, its 

 long pile yellowish white; in the female not tapering to a point behind, 

 its apex rounded. Coxse and femora black, apices of front and middle 

 femora yellow; frout and middle tibi;e yellow, the hind ones black; 

 tarsi yellow, under side of the first two joints of hind tarsi beset with 

 small black points, sides of hind metatarsi destitute of long black 

 spines. Knob of halteres yellow. Wings hyaline, the stigma grayish 

 brown. 



Types.— ^o^. 3241 and 3242, U.S.N.M.; length, 3 to 4 mm. Eight 

 males and inne females, one of which was received from Mrs. A. T. 

 Slossou, to whom the species is respectfully dedicated. 



LocaUty. — New Hampshire. 



EUHYBUS, new genus. 



Same as Hyhos., with these exceptions : Eyes in both sexes contiguous 

 on the face, proboscis much shorter than height of head, under side of 

 hind tarsi destitute of short black spines, halteres black. Contains the 

 species: Hyhos subjectus, Walker, H. purpurcns, Walker, and II. triplex, 

 Walker. 



