98 



eye lieiglit. antenna' nearly as long as the i'aee, the third Joint 

 fonr tunes as long- as the second, arista thickened on the basal 

 third, tlie penultimate joint sliorter than broad, facial ridges 

 bristly on the basal tifth, thorax gray pollinose, nrarked with 

 I'onr black vitta», scutelhini bearing four pairs of long marginal 

 macrochu'ta', abdomen on the last three segments gray i)olli- 

 nose, the hairs rather long and suberect; Avings hyaline, third 

 vein bearing one or two bristles at its base, calypteres white; 

 length, nun. White Mountains, New Hampshire, and Frank- 

 ford, Pa. Two fenuilcs, collected bj' Mrs. A. T. Slosson and 

 Mr. C. ^y. Johnson, August 20, 1895. Type No. X>9(>, U. S. 

 National Museum amplexa n. sp. 



17. Palpi and legs black, middle tibi.e each bearing two or more macro- 

 clnetie on the front side near the middle; front in the male 

 three-fourths, in the female one and one-sixth times, as wide 

 as either eye; a dark brown reflecting si)ot below each of the 

 lowest frontal bristles; third Joint of antenna- in the male three 

 and one-half, in tlie female two and one-fourth, times as long 

 as the secoinl; length, 9 to 11 mm. Sharon, Mass.; nortliern 

 Illinois, California, and Oregon. (Can. Entomologist, Vol. XIX, 

 p. 10 L; September, 1887: Tachina [Exorhia]. rarexorista 

 fntilis O. S., IJrauer and Bergenstamm in litt.). . . .futilis O. S. 

 Pali>i yellow, midille tibiie each bearing a single macroclnvta on the 

 front side near the middle, front m female three-fifths as wide 

 as either eye, her third antennal Joint three and one-half times 

 as long as the second, no dark spots below the lowest frontal 

 bristles; length, 9 mm. Dist. Columbia. (BiologiaCent.-Amer., 

 Diptera, Vol. 11, p. 74; February, 1890.). .<jrheomicnns v. d. W. 



IS. Hind tibiie outwardly ciliate 19. 



Hind tibia? not ciliate, lour postsutural inacrochieta^ middle tibitc 

 each bearing two or more niacrocha'ta' on the front si<le 

 near the middle; black, the palpi yellow; front in male twO' 

 thirds as wide as either eye, the sides bearing numerous 

 rather short hairs, no orbital bristles in the male, frontal bris- 

 tles descending almost to apexof second antennal Joint, cheeks 

 one-sixth as wide as the eye height, facial ridges bristly on the 

 lower half, antenna^ nearly as long as the face, the third joint 

 four times as long as the se(;oud, arista tliickened nearly to the 

 middle, the penultimate Joint slightly longer than broad; tho- 

 rax gray pollinose, marked with four black vittu', scutellum 

 bearing four pairs of marginal nmcrochieta?; abdomen whitish 

 pollinose on bases of last three segments, its hairs subde- 

 pressed; wings hyaline, third vein bearing three bristles near 

 its base, bend of fourth appendiculate, apical cell short petio- 

 late, calypteres white; length, mm. Virginia. A male speci- 

 men. Type No. 3597, U. S. National Museum . .petiolata n. sp. 



