220 Journal New York Entomological Society. [Voi. vii. 



vibrissse than at base of antenna-, median carina of face very high and broad, vibrissa 

 inserted more than the length of the second joint of the antennx above the front edge 

 of the oral margin, two or three bristles above each, facial ridges arcuate, remote at 

 the vibrissa, sides of the face bare, cheeks slightly more than one-third as wide the eye- 

 height, eyes bare, proboscis rather slender, less than half as long as height of head, 

 labella small, palpi wanting. Body subopaque, thinly gray pruinose, thorax marked 

 with five black vittce, bearing four pairs of postsutural dorso-central macrochtette, second 

 and third segments of abdomen with marginal but no discal ones. Wings hyaline, 

 third vein bearing one or two bristles near the base, veins elsewhere bare, posterior 

 cross-vein a short distance beyond middle between the small and the bend of the 

 fourth vein, the latter arcuate, destitute of an appendage, apical cell open, ending a 

 short distance before the extreme wing-tip, calypteres gray. Hind tibiae not ciliate, 

 pulvilli greatly elongated. Length, 7 mm. 



Waldoboro, Maine, A single specimen collected by Mr. J- H. 

 Lovell. Type No. 41 19, U. S. Nat. Museum. Has much the form 

 of the common house-fly. 



Metadexia tricolor, gen. et sp. nov. 



Male and female. Black, the antennse, at least basally, palpi, labella and 

 abdomen yellowish, first segment of abdomen largely or wholly, a dorsal vitta on the 

 second and third, sometimes the bases of these segments, or their apices and the base 

 of the fourth and the under side from the base to beyond the middle of the third seg- 

 ment, black or brown, femora and tibiae sometimes partly or wholly yellow, scutel- 

 lum tinged with reddish. Front of male one-fourth, of the female almost as wide as 

 either eye, two pairs of orbital bristles in the female, wanting in the male, frontal 

 bristles descending almost to base of antennae, head at the vibrissa; noticeably shorter 

 than at base of antenna;, epistoma produced forward, sides of face bare, white prui- 

 nose, facial ridges nearly straight, strongly diverging below, vibrissae widely separated, 

 inserted slightly above the front edge of the oral margin, two or three short bristles 

 above each median carina of face very low ; antennas reaching from two-thirds to three- 

 fourths of distance to the oral margin, the third joint from one and one-half to 

 two and one-half times as long as the second, hairs of arista nearly three times 

 as long as its greatest diameter at the base, cheeks over one-third as broad as 

 the eye-height, proboscis rather robust, half as long as height of head, la- 

 bella rather large, palpi well developed. Thorax opaque, gray pruinose, marked 

 with four black vittae, bearing four postsutural dorso-central and two sternopleural 

 macrochastae. Abdomen shining, bases of the segments white pruinose, each segment 

 bearing marginal macrochaetae and in the male the last three segments with discal 

 ones. Wings hyaline, the veins bordered with brownish, most distinct in the female, 

 first vein bearing several bristles near its middle, the third bristly at least one-third of 

 distance to the small crossvein, posterior crossvein beyond the middle of the distance 

 from the small to the bend of the fourth vein, the latter almost rectangular and des- 

 titute of an appendage, apical cell open, ending some distance in front of the extreme 

 wing-tip ; calypteres white. Hind tibiae not ciliate, pulvilli of male very elongate. 

 Length, 6 to 9 mm. 



