89 
of orbital bristles in the female, none in the male, frontal bristles 
descending below middle of second antemial joint, cheeks one- 
fourth as wide as the eye-height, facial ridges bristly on the lowest 
fourth, antenna 1 four-fifths as long as the face, the third joint 
one and one-half times as long as the second, arista thickened on 
the basal fourth, the penultimate joint shorter than broad ; thorax 
gray pollinose, marked with three black vitta\ three postsntnral 
machrochaetae ; abdomen thinly gray pollinose and with blackish 
reflecting spots, last three segments bearing discaland marginal 
macrochsetae ; middle tibia' each bearing two or more macro- 
chaetae on the front side near the middle, front pulvilli of male 
as long as the last tarsal joint; wings hyaline, third vein bear- 
ing one or two bristles near the base; calypteres white; length, 9 
mm. Norfolk, Va., and Kirk wood. Mo. Four males and two 
females. Type No. 3580, U. S. National Museum, .penitalis.n. sp. 
Genus MACROMEIGENIA Br. and Berg. 
Macromeigenia Brauer and Bergeiistamm, Zweif. Kais. Mas. Wien, V, p. 311; 1891. 
The type species is black, the first two antennal joints, palpi, and 
fourth abdominal segment, except sometimes its base, yellow; four 
postsntnral and three sternoplenral macroclnet;e ; length, 11 to 14 mm. 
Northern Virginia and Tiffcon, (la. (Ausser. Zweif. Insekten, Yol. II, 
p. 309; L830: Tachina, Tachina interrupta Walker, Insecta Saunder- 
siana, Vol. 1, p. 295; 1856.) .... chrysoprocta Wied. 
Genus GYMN0CH.ETA Desv. 
Gymnochceta Desvoidy, Essai snr l<\s Myodaires, p. 371 ; 1830. 
Body, occiput, and sides of front green, antennae and legs black; 
sometimes the third antennal joint is yellow, and rarely the entire 
antenna 1 is yellow; palpi yellow, frontal bristles in single rows; length, 
10 to 12 mm. Newark, N. J., and Colorado. (Diptera Amer. Sept. 
Indigena, Cent. VIII, No. 61; 1869. Gymnochceta rujicornis Williston, 
Trans. Amer. Ent. Soc, Vol. XIII, p. 302; October, 1886.) . . alcedo Loew. 
Unrecognized xpeeics. — G. vivida Williston, Trans. Amer. Ent. Soc, 
Vol. Xlli, p. 302; October, 1886. Pa. 
Genus METAPHYT0, 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 female one and one-third 
times as wide as either eye, two pairs or orbital bristles, frontal s 
descending to middle of second antennal joint, vibrissa' slightly above 
the level of front edge of oral margin, two or three bristles above each, 
antenna' nearly four- fifths as long as the face, the third joint one and 
