83 



subsliiuing, last three segments lightly grayish pollinose except 

 their apices, each seguient bearing marginal macrocha'ta^, wings 

 hyaline, base of third vein bearing tliree bristles near the base, 

 apical cell closed and very sliort petiolate, ending slightly before 

 the extreme wing ti]) ; calypteres w hitisli ; length, 1 mm. Tifton, 

 Ga. A single female specimen collected in June, 180G, by Mr. 

 G. Iv. Pilate. Ty])e No. IM'iS'J, U. 8. Kational M ui>eum . (jenalis n. sp 



G«ra o ATACTA Schinc r . - L^^-^ ^f^ .^^O ^^U^ 



Jtac<a Schiuer, Reise ilcr Frcgatto Novara, Di]»tera, p. 328; 1868. "^ 



Our single species is black, the apex of the scutellunivellowish, the 

 fourth segment of the abdomen wholly golden yellow f^ront of male 

 less than one-third as wide as either eye, the sides bluish-gray polli- 

 nose and thickly covered with short suberect hairs, frontal bristles 

 descending nearly to middle of second antennal joint, cruciate except 

 the vertical pair; cheeks one-fourth as wide as the eye-height, face 

 yellow pollinose, the ridges broadly bordered internally with black, 

 sides of face at narrowest part one-third as wide as the median depres- 

 sion, vibrisste situated two-thirds the length of the second antennal 

 joint above the level of front edge of oral margin, ridges bristly on the 

 lowest tilth, antenna' two-thirds as long as the face, the third joint 

 slightly longer than the second, arista thickened on the basal two-fifths, 

 the penultimate joint broader th.m long; thorax gray pollinose, marked 

 with four black vitt;c, four postsutural and four sternopleural macro- 

 clia'tie, scutellum bearing tliree i)airs of long marginal; abdomen gray 

 l)ollinose on the first three segments, the first two destitute of dorsal 

 macioclnetai, the last two each bearing a marginal row; front pul villi 

 as long as the last tarsal joint, middle tibia? each bearing four or more 

 macrocha'ta' on the front side near the middle; wings hyaline, third 

 vein bearing two or three bristles near the base, calypteres white; 

 length, VI mm. Tifton, Ga. A single male specimen collected Sep- 

 tember :iS, 1896, by G. II. Pilate. Type Ko. 3583, U. S. National 

 Museum aj)icalu n. s^). 



Genus SIPHOSTURMIA, new genus. 



The principal characters of this genus have been given in the table 

 of genera on previous pages. The type species is black, the first two 

 joints of antenna-, lower part of face, palpi, scutellum, y»i))()ex of abdomen, 

 and sometimes the sides, yellow; four postsutural and four sterno- 

 ]ilenral macrocha'ta', two or more on front side of each middle tibia 

 near the middle, marginal ones on the first three, or the second and 

 third, segments of abdomen ; length, 10.5 mm. Tifton, Ga., and Florida. 

 (Journal N. Y. Ent. Soc, Vol. Ill, p. 100; Sei)tember, 1895: Arf/i/ro- rv^^ , 

 phijlax.) rostrata Co(]. {lv ^M-^ 



