184: Journal New York Entomological Society. [Voi. x. 



length, the fifth scarcely longer than the fourth ; femora olive green, the front ones 

 and anterior side of the others opaque, olive green pruinose, posterior side of the 

 latter polished, tibise and tarsi black*, front tarsi not thickened, claws strongly arcuate ; 

 wings grayish hyaline, marginal cell dark gray, small crossvein noticeably before 

 middle of discal cell ; halteres yellow. Length, 4 mm. 



Habitat. — Salt Lake, Utah. 



A male specimen collected June 25 by Mr. E. A. Schwarz. Type 

 No. 6644, U. S. N. M. 



Ephydra pilicornis, sp. nov. 



Dark bluish-green, antenna;, mouth parts, tibiie and tarsi black, the halteres and 

 front knees yellow ; three pairs of fronto- orbital bristles, on the inner side of each 

 row is a gray pruinose vitta connected with a similar one on lower edge of front, disc 

 of front without long bristles, face on lower half and along the eyes yellowish-gray 

 pruinose, third joint of antennae bearing a long bristly hair on the outer side, arista 

 dark brown, short-pectinate on upper side of basal half; mesonotum and scutellum 

 somewhat polished, the front end and sides of the former and the pleura yellowish- 

 gray pruinose, five pairs of dorsocentral bristles, no acrostichals, scutellum bearing 

 two pairs, abdomen slightly polished, segments two to four of nearly an equal length, 

 the fifth almost twice as long as the fourth ; wings grayish hyaline. Length, 3.5 mm. 



Habitat. — Biscayne Bay, Florida. 



A male specimen collected by Mrs. Annie T. Slosson. Type No. 

 6645, U. S. N. M. 



Scatella triseta, sp. nov. 



Olive green, the antennje and tarsi black, the halteres yellow ; front yellowish- 

 gray pruinose, somewhat polished each side of the middle, no long bristles on the 

 disc, three pairs of fronto-orbital bristles, face whitish-gray pruinose, a brownish- 

 pruinose vitta in middle of upper half, arista rather long pubescent on the upper side ; 

 mesonotum and scutellum opaque, brown pruinose, three pairs of dorsocentral bristles, 

 the anterior pair in front of the suture, no acrostichal bristles, the bristly hairs between 

 the dorsocentral rows arranged in two rows, humeri and pleura olive gray pruinose* 

 on upper portion of the latter partly brown, scutellum bearing four bristles, abdomen 

 opaque, olive gray pruinose, an indistinct brownish fascia at bases of the segments, 

 fifth segment in the male nearly twice as long as the fourth ; wings hyaline, marked 

 with four indistinct white dots, of which one is in the submarginal cell above the hind 

 crossvein, one near base and another beyond center of first posterior cell, the remain- 

 ing dot near apex of discal cell, costal vein reaches apex of fourth vein. Length, 

 3 mm. 



Habitat. — Williams, Arizona. 



One male and four females collected Jime 6 by Mr. H. S. Barber. 

 Type No. 6646, U. S. N. M. 



