418 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.49. 



Female. — Blackish, silvery poUinose, largely golden above. Cheeks 

 and occiput silvery-white, former often tinged with brassy in front, 

 facial plate brassy-silvery, parafacials and parafrontals deep golden, 

 frontaha and antennae velvety-black or dark brown, antennae 

 obscurely fulvous on base of third joint, palpi fulvous. Mesoscutum 

 deeply polhnose with pale gold to golden-whitish, leaving two very 

 broad velvet-black vittae which do not reach scutellum. Pleurae 

 silvery-white, with slight marmoration. Scutellum and abdomen 

 dull ashy-gold, with marmorations in two mediobasal spots on seg- 

 ments two to four and a posterolateral spot on segments two and 

 three. Venter cinereous. Femora fulvous, faintly silvery, blackish 

 on tips; tibiae pale rufous, tarsi blackish. Wings clear; tegulae 

 watery- whitish, hind scale with tawny or obscure tinge. 



Male. — Facial plate deep golden, extending on cheeks. Antennae 

 wholly black. Abdomen more thickly pale gold poUinose, with broad 

 blackish hind borders to all segments, these being connected by a 

 narrow median vitta of blackish. Venter pale golden. Tibiae all 

 black except rufous tinge on middle of intermediate and hind pairs. 



Holotype.—Csit. No. 19439, U.S.N.M., female. TD 4206. Allotype, 

 male. Paratypes, male, TD 4213; females, TD 4205, 4219. 



NEOMINTHOPSIS, new genus. 



Genotype. — Neominthopsis discalis, new species. 



Differs from Minthopsis as follows: Faciaha cihate only one-third 

 way up. Parafacials bare. Cheeks hardly over one-fourth eye- 

 height in female. Eyes distinctly but very tliinly hairy. Long erect 

 discal bristles on intermediate abdominal segments. Anal segment 

 with marginal, submarginal, and discal transverse rows, and an 

 anterior discal pair of bristles. Median marginal pair on segment one. 

 Three sternopleurals and three postsuturals. Female tarsi normal, 

 front ones with long claws, metatarsi not unusually long. Legs not 

 elongate or slender. Apical cell open just before wingtip. 



NEOMINTHOPSIS DISCALIS, new species. ^ 



Length of body, 6.75 mm.; of wing, 5.5 mm. One female, Pacha- 

 cayo, Peru, about 12,000 feet, on flowers of Eupatorium, sp., March 27, 

 1913 (Townsend). 



Strongly resembles Minthopsis vittata, differing in coloration from 

 description of that species only as follows : Silvery polhnose, without 

 distinct tinge of golden. Antennae wholly black. Scutellum silvery, 

 the sides blackish. Abdomen silvery, with broad irregular black 

 median vitta which spreads more or less along hind margins of 

 segments one to three, invading base of anal segment in middle. 

 Legs black, femora silvery on outside. Wings faintly tinged with 

 smoky-yellow. Tegulae pale yellow, hind scale white on disk. The 



