Mr. J. R. Mallocli on Exotic MuscariJee. 423 



three contiguous black vitt?e ia front of suture, the usual 

 spaces between tlie vitbiR brownish, the area laterad of the 

 vittcc and a small transverse spot in front of suture on each 

 side of median line whitish pruinescent; vittse behind suture 

 contiguous on anterior half or more, a patch of whitish 

 l)ruiiiescence on each side of median vitta just in front 

 of scutelluin ; pleura largely whitish pruinescent, margins of 

 sclerites blackish; scutellum whitish on margins apically. 

 Second and third abdominal tergites each with a pair of 

 large subtriangular black spots, which are narrowly sepa- 

 rated centrally and extend from anterior to posterior 

 margins; fourth tergite with a large subquadrate black 

 central spot and a less distinct brownish spot on each side. 

 Legs black. Wings brownish. Calyptrse and halteres 

 yellowish. 



Eyes at narrowest part of frons separated by about width 

 of anterior ocellus; parafacial veiy narrow; longest hairs 

 on arista longer than width of ttiird antennal segment. 

 Anterior two pairs of postsutural dorso-centrals weak. 

 Bristles on posterior margins of second, third, and fourth 

 tergites, and median bristles on fourth strong ; basal 

 sternite with a few hairs. Fore tibia unarmed at middle; 

 mid-femur with some long fine hairs on basal half of postero- 

 ventral surface ; mid-tibia with a posterior bristle ; hind 

 femur with some fine hairs on basal half and four or five 

 long bristles on apical half of antero-ventral surface, the 

 basal half of postero-ventral surface with some bristles ; 

 hind tibia Avith one antero-dorsal and one antero-ventral 

 biistle. Fourth vein distinctly curved forward apically. 



Female. — Differs from the male in having the opaque 

 black frons about one-third of the head-width, the thoracic 

 vittas more brownisli, and the dorsal spots on abdomen 

 larger. 



Length Q-7 mm. 



Tyjje, male, allotype, and one male paratype. Tliereso- 

 polis, Brazil, ix. 1887. 



I believe this is the species recorded from Brazil by Stein 

 as corvina, van der Wulp. I have before me a paratype of 

 van der Wulp's species and it has the arista much shorter- 

 haired, the abdomen diflerently marked, and the wings 

 hyaline. 



Genus Emmesina, uov. 



Generic characters. — Most closely related to AFydcea, the 

 third wing-vein bristly at base, prosternum bare, and hind 



