138 
and lower side of the third at its base, the palpi, apex of scutel- 
lum and of the abdomen, yellow: front in female one and one-fifth 
times as wide as either eye, two pairs of orbital bristles, sides 
of face bristly on the upper two-thirds in addition to the row of 
macrochetie, cheeks slightly wider than the eye height, antenne 
four-fifths as long as the face, the third joint four times as long as 
the second; arista thickened on the basal three-fifths, the penulti- 
mate joint four times as long as wide, nearly twice as long as the 
first joint; thorax gray pollinose, marked with four black vittze ; 
scutellum bearing three pairs of long marginal macrochete ; 
abdomen destitute of dorsal macrochiete on the first two seg- 
ments, the third with a marginal row, the fourth covered except 
on the basal half; middle tibize each bearing three long macro- 
chietze on the outside near its middle, front tarsi slightly dilated ; 
wings hyaline, apical cell nearly as wide as the discal cell, third 
vein bristly nearly halfway to the small crossvein, the others 
bare, bend of fourth vein not appendiculate, calypteres white; 
length,11 mm. Beverly, Mass. Two female specimens. Type 
No. 3643, U. S. National Museum............-- orientalis 1. Sp. 
Genus MICROPHTHALMA Macq. 
Microphthalma Macquart, Dipteres Exotiques, Vol. I, Part II, p. 241 (84); 1843. 
Our species is black, the antenne, face, cheeks, palpi and apex of 
proboscis, yellow; three postsutural and three sternopleural macro- 
chete; length, 12 to15 mm. Franconia, N. H.; Beverly, Mass.; Dis- 
trict of Columbia; Chies°~ 1; Georgia; Utica. Miss.; Texas; Onaga, 
Kans., and Kern County, Cal. (Analecta Entomologica, p. 45; 1824: 
Tachina, Miltogramma trifasciata Say, Jour. Acad. Nat. Sciences 
Phila. Vol. VI, p. 174; 1829. Microphthalma nigra Macquart, Dipteres 
Exotiques, Vol. I, Part III, p. 242 (85); 1843. Tachina trivoides 
Walker, List of Dipt. Insects, Part IV, p. 760; 1849. Megaprosopus 
michiganensis Townsend, Trans. Amer. Ent. Soc., Vol. XLX, p. 111; 
May, 1892. Macronychia trifasciata Say, Brauer and Bergenstamm in 
litt. Dexiosoma sp., Brauer and Bergenstamm in litt.) ..disjuncta Wied. 
Genus AMOBIA Desv. 
Amobia Desvoidy, Essai sur les Myodaires, p. 96; 1830. 
Macronychia Rondani, Dipterologie Italic Prodromus, p. 229; 1859. 
Trixoclista Townsend, Trans. Amer. Ent. Soc., Vol. XIX, p. 102; 1892. 
Ammobia Brauer and Bergenstamm, Zweifliigler Kais. Mus. Wien, VI, p. 226; 1893. 
(Non Billberg, Enumeratio Insectorum, p. 105; 1820.) 
The synonymy of Amobia and Macronychia has already been given 
by Schiner,! and repeated by Brauer and Bergenstamm.’ Two species 
occur in our fauna; both have only three postsutural macrochete : 
Thorax marked with three or five black vitte; abdomen gray polli- 
nose, marked with three rows of black spots; orbital bristles 
| Fauna Austrica, Vol. I, p. 501; 1862. 
2 Zweif. Kais. Mus. Wien, VI, p. 226; 1893. 
