406 THE yOETH AMEEICAX EMPIDJE—COQUILLETT. vol. xviii. 



times as long as lieigbt of head, palpi yellow. Thorax, pleura and 

 scutellum black, opaque, bluish-gray polliuose; thorax marked with 

 four blackish-brown vitta?, its pile rather numerous but quite short, 

 black 5 pile in front of halteres white, abundant, tine; scutellum bear- 

 ing four bristles. Abdomen black, opaque, light bluish-gray polliuose, 

 its pile white, that on sides near base rather long and abundant; no 

 fringe of long black bristles near hind margin of any of the segments. 

 Legs slender, simple, femora destitute of long bristles; cox?e brownish 

 5-ellow, the hind ones largely blackish; femora, tibia?, and tarsi brown- 

 ish-yellow, apices of tarsal joints and last joint wholly blackish; middle 

 metatarsi scarcely thicker than the front ones, hind metatarsi nearly 

 twice as thick but scarcely longer than the front ones. Knob of hal- 

 teres yellowish-white. Wings grayish hyaline, stigma and veins dark 

 brown, no long bristle on costa near its base. 



Ty2)t\ — is^o. 3179, U.S.X.M.; length, 7 mm. A single female collected 

 by Mr. Charles Eobertson. 



Locality. — Illinois. 



EMPIS LEVICULA. new species. 



Male. — Head black, bluish gray pollinose, eyes contiguous; antennte 

 black, the two basal joints yellow, style over one-half as long as the 

 third joint; proboscis yellowish, black at the apex, over three times as 

 long as height of head, palpi yellow. Thorax, pleura, and scutellum 

 black, opaque gray pollinose; thorax with four brown vittne, its sparse 

 pile and bristles black; pile of pleura white, scutellum bearing four 

 bristles, the two outer ones very short. Abdomen black, opaque brown 

 pollinose, its sparse pile white; hypopygium small, the filament hidden. 

 Legs slender, destitute of long bristles, dark yellowish, including the 

 coxfe ; the tarsi toward the apex black ; front metatarsi nearly as long, 

 but only about one-half as thick as the hind ones. Wings whitish 

 hyaline, veins brownish, stigma wanting. Halteres yellow. 



Female. — Same as the male, except that the thorax and abdomen are 

 wholly bluish white pollinose. 



Types.— Eos. 3180 and 3181, U.S.N.M. ; length, 6 to 7 mm. Two males 

 and three females collected by Mr. Charles Eobertson. 



Locality. — Illinois. 



EMPIS MANCA, new species. 



Male. — Head black, gray pollinose, eyes separated the width of the 

 lowest ocellus, facets of a uniform size; antenunB black, third joint 

 narrow, elongate, style one-third as long as the third joint; proboscis 

 one and one-half times as long as height of head, palpi yellow. Thorax 

 black, opaque gray pollinose, marked with four black ijollinose vittte, 

 its sparse pile and bristles black; pleura black, light gray pollinose, 

 its pile black; scutellum black, gray pollinose, bearing four black 

 bristles. Abdomen dark brown, hind margin of each segment whitish. 



