56 
of orbital bristles, frontal bristles descending to middle of second 
an tennal joint, antenna' as long as tlie face, the third joint three 
times as long as the second, two and one-half times as long a< 
wide, arista thickened on the basal two-thirds, the penultimate 
joint three times as long as broad, two fifths as long as the last 
joint; vibrissa slightly below level of front edge of oral margin, 
only two or three bristles above each; thorax gray pollinose, 
not vittate, scutellum the same, bearing two pairs of long mar- 
ginal macroclnetaB and a short apical pair; abdomen gray pol- 
linose on bases of the second and third segments, second segment 
bearing a marginal pair of macroclneta', the third with a mar- 
ginal, the fourth with a discal, row; calypteres white; length, 
4 mm. Natrona, Pa. A single female specimen collected by 
Mr. C.W.Johnson, July 31, 1895. Type No. 353G, IT. S.National 
Museum johnsani n. sp. 
2. Third joint of antennae in the male truncate at the apex, where it is 
over twice as wide as at its base, its upper edge nearly straight; 
length..'} mm. Southern California; and Owl Creek Mountains, 
Wyoming. (Konig. Sven. Fiegatt. Eugenies Hesa, p. 527; 1808: 
Lopkosia. Clausicella <<nt<)iii<<lis Coquillett, Journal N. Y. Ent. 
Soc, Vol. Ill, p. 56; June, 1895.) setigera Thorn. 
Third joint rounded at the apex where it is at most one and one- 
half times as broad as at its base 3. 
3. Last joint of front tarsi of female over four times as long as the 
second, third joint of antenna' of male nearly straight on upper 
edge, noticeably longer than wide; length 3 to 4 mm. White 
Mountains. New Hampshire; Lakeland, Md.j and Northern 
Illinois. (Journal N. Y. Ent. Soc, Vol. Ill, p. 50; June, 1895. 
New genus near Bigonichceta, Brauer and Bergenstamm in 
lift. ) tarsalw Coq. 
Last joint of front tarsi of female shorter than the second, third 
joint of antenna' of male strongly convex on upper side, only 
slightly longer than wide; black, the palpi yellow; front in both 
sexes one and one-half times as wide as either eye, two pairs of 
orbital bristles, frontals descending almost to tip of second 
antenna! joint, facial ridges bristly on the lowest two-fifths to 
one-half, antenna* almost as long as the face, the third joint five 
times as long on the second, arista thickened nearly to the 
tip, the penultimate joint two-thirds as long as the last one; 
thorax gray pollinose, not black vittate, abdomen shining, bases 
of last three segments whitish pollinose except in the middle; 
wings hyaline, third vein bearing one or two bristles at the 
base, calypteres whitish: length, 3 to 3.5 mm. White Mount- 
ains, New Hampshire, and New Bedford, Mass. Three males 
and one female, the former collected by the late H. K. Morrison, 
the latter by Dr. Hough tisitata n. sp. 
