89 



of orbital bristles in the female, none in the male, frontal bristles 

 descending" below middle of second antennal joint, cheeks one- 

 fourth as wide as the eye-height, facial ridges bristly on the lowest 

 fourth, antennic four-hfths as long as the face, the third Joint 

 one and one-half times as long as the second, arista thickened on 

 thebasal fourth, the penultimate joint shorter than broad ; thorax 

 gray poUinose, marked with three black vitta>, three postsutural 

 machrocha'tu'; abdomen thiidy gray pollinose and with blackish 

 rellecting spots, last three segments bearing discal and marginal 

 macroclueta^ ; middle tibiae each bearing two or more ma(!ro- 

 clueta' on the front side near the middle, front pulvilli of male 

 as long as the last tarsal joint; wings hyaline, third vein bear- 

 ingoneortwo bristles near the base; calypteres white; length, 9 

 mm. Norfolk, Ya., and Kirkwood, Mo. Four males and two 

 females. Tyi)e No. 3580, U. S. National Museum, .penitalin n. sp. 



Genus MACROMEIGENIA Br. and Berg. 



MacromeUjeiiia lirauer ;ui(l ]>er.<jjeiist,;uiiiii, Zwcif. K.ais. jNIus. Wien, V, p. .311; 1891. 



The type species is black, the first two antennal joints, palpi, and y^ 

 fourth al)dominal segment, excei)t sometimes its base, yellow; four 

 l)Ostsntural and tliree sternopleural macroclia'ta' ; length, 11 to 14 mm. 

 Northern Virginia and Tifton, (la. (Ausser. Zweif. Insekten, Vol. 11, 

 ]). 300; 1S;>0: Taehina. Trtc/zina m^errM^frt Walker, Insecta yauiuler-. 

 siaua. Vol. I, p. 205; 185G.) .... chrysoprocta Wied. 



Genus GYMNOCH^TA Desv. , , 



<!ymi>oclin;ta Desvoidy, Essai snr les Myoilairos, p. 371; 18.30. 



Body, oc(;iput, and sides of front green, antenmc and legs black; ,, 

 sometimes the third antennal joint is yellow, and rarely the entire^^A^^^^ — J- 

 antenna' is yellow; palpi yellow, frontal bristles in single rows; lengtli, jP;. 



10 to 12 mm. Newark, N. J., and Colorado. (Diptera Ainer. Sept. —- 



Indigena, Cent. VIII, No. 01; 18<;0. ^T^wuoc/<rr/« rjA/?YY^r/m Willistoii^" -'^^'^ '"'''^^ ' 

 Trans. Amer. Eut. Soc., Vol. XIII, p. 302; October, 1880.) . .alcedo Loew. / a^ ^ 



Ilnrecofpiized species. — (r. rfrjV?a Williston, Trans. Amer. Ent. Soc, , o^^^-sL-<-*'-t-o 

 Vol. Xlli, p. 302; October, 1880. Pa. 



Genus METAPHYTO, new genus. 



The characters of this genus may be gleaned from the above table of 

 genera and the following description of the type species: Black, the 

 apex of the scutellum yellowish; front of fenuile one and one-third 

 times as wide as either eye, two pairs or orbital bristles, frontals 

 descending to middle of second antennal joint, vibris&a^ slightly above 

 the level of front edge of oral margin, two or three bristles above each, 

 antennte nearly four-iifths as long as the face, the third joint one and 



I r^^y-^ r--c^'~c<^ey<^ 





