NO. 2115. NEW NEOTROPICAL MUSCOID FLIES— TOWNSEND. 419 



pollen of thorax and abdomen shows a suggestion of brassy in some 

 lights. No marmoration on abdomen. 



Eolotype. —Cat. No. 19440, U.S.N.M. TD 4138. 



EPIPHANOCERA, new genus. 



Genotype. — Epiplianocera costalis, new species. 



Differs from Neominthopsis as follows: Front at vertex slightly 

 narrower, about one-third head-width in both sexes. Frontaha not 

 quite so broad, a httle wider than one parafrontal in female, shghtly 

 wider in male. Faciaha bare. Antennae considerably heavier, 

 nearly ahke in both sexes, slightly longer in female than in male; 

 third joint gently rounded apically, with shght angle on upper 

 apical corner. No discal abdominal macrochaetae in either sex, 

 even on anal segment. Cheeks nearly one-third eye-height in both 

 sexes. Palpi widened and flattened, upper surface smooth and 

 nearly bare. Wings conspicuously broader, apical cell ending in 

 exact wingtip. Legs, especially tarsi, more slender. Claws short in 

 both sexes, and both with two prochnate fronto-orbitals. Female 

 without piercer. 



EPIPHANOCERA COSTALIS, new species. 



Length of body, 6 mm.; of wing, male 5 mm., female 6 mm. One 

 female and three males, Huariaca, canyon of the Rio HuaUaga, Peru, 

 about 10,750 feet, December 20 and 21, 1913, on fohage (Townsend). 



Black, rather shining. Head silvery polhnose, the parafrontals 

 with a faint golden tinge which is a little more marked in male. 

 Frontaha and antennae soft black. Palpi pale fulvous, with silvery 

 sheen. Thorax silvery; with two heavy broad black vittae on 

 mesoscutum, each showing a short pollinose line just in front of 

 suture; scutellum blackish. Abdomen pohshed black, the bases of 

 last three segments rather broadly silvery-white with interruption 

 on median Une, the pollen with golden shade in male. Legs blackish, 

 tibiae brownish. Wings clear, except fuscous costal area extending 

 from costal spine to end of second vein. Tegulae pearly translucent 

 whitish. 



Holotype.—Csit. No. 19608, U.S.N.M., female. TD 4218. Allo- 

 type, male. Paratypes include TD 4210, male. 



RHOMBOTHYRIOPS, new genus. 



Genotype. — RhombotTiyriops elegans, new species. 



Differs from Brauer and Bergenstamm's description of Rhorribo- 

 thyria as follows: Arista practically bare, with only the most micro- 

 scopic pubescence. Antennae of female reaching two-thirds way to 

 oral margin, those of male about five-sixths way. Third antennal 

 joint of female nearly four times as long as second, that of male about 

 five times as long. Costal spine very short, but visible. Abdominal 



