298 A. L. MELANDER. 



of each abdominal segment except the first. Coxfe and legs yellow, hind 7iieta- 

 tarsi much thicker than the front ones. 7 mm. 



Illinois (Robertson). 



Einpis pceciloptera Loew. 

 Cent. i. 31. 



Female. — Yellow, black-pilose. Head yellow. Proboscis yellow, about equal 

 to twice the length of the head. Antennae long, slender, yellow, the upper mar- 

 gin and the apex of the third joint black. Thorax opaque. Abdomen shining. 

 Legs long, slender, pale yellow, the apex of the tarsi black. Halteres yellow. 

 Wings long, subcinerascent, with a luteous tinge, veins fuscous, the transverse 

 veins bordered with fuscous; the anterior branch of the third vein joined with 

 the .second vein by a cross-vein. 4.1 mm. 



New York (Edwards). 



Einpis lonjfipes Loew. 

 Cent, v, 51. 



3Iale. — Slender, rather bare, yellowish, darker above. Head black, cinereous 

 with whitisii pollen. Front very narrow. Antennae very slender, black, the 

 terminal style moderate. Proboscis about equal to the first two joints of the 

 front tarsi taken together. Thorax lutescent; the dorsum cinereous, opaque, 

 with four narrow fuscous vittte, the middle ones abbreviated posteriorly, the 

 outer ones much shortened anteriorly, provided with very sjiarse black bristles 

 and short hair. Scutellum lutescent. Abdomen luteous, shining, with a median 

 vitta on the posterior blackish margins of each segment. Hypopygium moder- 

 ate, yellow, open, the apex with black hairs, the central filament very thick, con- 

 colorous, hidden beyond the base. Legs long, slender, yellow, with short black 

 pile, tarsi piceous, the first joints apically, the others wholly black. Wings yel- 

 lowish cinereous, veins brownish yellow, stigma coucolorous, nearly wauling. 

 5.5 mm. 



New York, Lake George (Osten Sacken). 



One female, Alleghany, Pennsylvania, differs from Loew's de- 

 scription of the male as follows : 



Basal joints of the antennse fuscous; the third a little longer than the other 

 two together, its style moderately thick, one-half the length of the third joint; 

 proboscis longer than the hind femora, fulvous on the basal half above ; no me- 

 dian vitta on the greatly shining abdominal segments, which are distinctly mar- 

 gined with black posteriorly and laterally; hind trochanters beneath and tip of 

 the femora narrowly black. The outer branch of the third vein is obtusely an- 

 gulate at its middle, the basal angle of the second submarginal cell being about 

 70 degrees. 



Enipis sordida Loew. 

 Cent, iii, 29. 



]\fii1e. — Pale tawny, opaque. Head cinereous. Proboscis shorter than twice 

 the length of the head. Basal two joints of the antennae fuscous, the outer 

 black. Eyes separated. Dorsum of the thorax with four fu.scous vittse, provided 

 with short black pile. Abdomen pale yellow, shining, the base of each segment 



