404 THE XOETR AMERICAN EMPIDM—COQUILLETT. voL.xvni. 



First auteunal joint two and a lialf times as long as tlie second, tlie 

 third joint one and a half times as long; as the first, sublanceolate, the 

 style rather slender, nearly half as long as the third joint. Proboscis 

 twice as long as height of head. Thorax opaque, gray pollinose, marked 

 with four brownish black vittoe, the shorter pile whitish, the longer 

 pile and bristles black. Pile on each end of pleura, on coxa^, venter, 

 and sides of abdomen whitish; middle and hind cox.ne bearing black 

 bristles. Scutellum bearing from six to eight black bristles. Abdomen 

 opaque, white pollinose, the short pile of the dorsum black. Hypo- 

 pygium moderately large, obliquely ascending, the central filament not 

 disengaged; no projections on venter in front of hypox^ygium; coxte 

 and legs simple, femora destitute of stout spines below, the bristles 

 very short; wings dark gray, stigma very elongated, dark brown, ante- 

 rior branch of third vein obli(pie and curved. 



Female. — Same as the male with these exceptions: Eyes widely sepa- 

 rated; abdominal segments beyond the fifth, shining; apical half of 

 under side of hind femora ciliate with rather short scales and si)ines. 



Types.— Nos. 3171 and 3172, TJ.S.X.M. ; length, 6 to 8 mm. Eleven 

 males and four females in the Museum collection. 



Locality. — Xew Hampshire. 



EMPIS TENEBROSA, new species. 



3Iale. — Dilfei's from the female of E. ravida only as follows: Eyes as 

 ■widely separated as the posterior ocelli. First two antennal joints 

 reddish, the first scarcely longer than the second, the third twice as 

 long as the first. Entire pile of thorax, j)leura, coxa?, venter and 

 abdomen, black. All femora robust, twice as thick as their tibise, the 

 middle and hind ones bearing numerous, rather long bristles on their 

 under side. 



Type.— So. 3173, U.S.KM.; length, G mm. Three males in the Mu- 

 seum collection. 



Locality. — Texas. 



EMPIS TERSA, new species. 



Male. — Differs from the male of E. ravida only as follows : Abdomen 

 shining reddish yellow; cox», femora, and tibia^ lighter yellowish; first 

 antenna! joint twice as long as the second, the third joint twice as long 

 as the first; proboscis three times as long as height of head; thorax 

 destitute of whitish pile, that at each end of the pleura black, each 

 coxai bearing several black bristles; pile and long bristles of abdomen 

 and venter wholly black. Scutellum bearing four bristles. Abdomen 

 shining, destitute of pollen. Hypopygium small, porrect; the central 

 filament free, filiform, arcuate. Bristles of middle and hind femora 

 rather long. 



Female. — Differs from the male in that the proboscis is six times 

 as long as height of head, when bent backward almost reaching the tip 

 of the abdomen. 



