NO. 2115. NEW NEOTROPICAL MUSCOID FLIES— TOWNSEND. 431 



wider and conspicuously convex on front border. Palpi only slightly 

 widened apically, not so strongly bent at tips. Proboscis about one 

 and one-third times head-height. Parafacials and cheeks without 

 pile, with black bristly hairs. Eyes bare. Body narrowed. Female 

 abdomen slightly swollen, male abdomen same width as thorax. 

 Front tarsi of female not widened or dilated. Third vein bristly 

 halfway or more to small crossvein. 



NEOARCHYTAS INAMBARICA, new species. 



Length of body, 7 to 10 mm. ; of wing, 6 to 8.5 mm. Seven females 

 and eight males, jmiction of the Yahuarmayo and Inambari rivers, 

 about 1,700 feet, February 11, 1910, on foUage in openings and along 

 edge of tropical rain-forest (Townsend). 



Face, cheeks, and borders of parafrontals pale golden-sdvery polli- 

 nose, the cheeks and frontal parts more distinctly golden, extending 

 on frontalia; the orbits of parafrontals in male more blackish. Disk 

 of parafrontals of female polished metallic greenish-black, bare; that 

 of male usually with purpUsh luster near vertex and thinly golden 

 poUinose in front. Frontalia rich brownish-ocher m direct view. 

 Antennae black, articulations obscurely rufous, or first two joints 

 and broad base of third rufous. Palpi f ulvorufous. Occiput golden- 

 ashy, with gold-gray beard. Thorax deep poUshed metallic purphsh- 

 black, wibh golden poUen only in front, where the beginnings of a 

 median pair of Unear vittae are visible. ScuteUum about same color, 

 but faintly pollinose. Abdomen of female showing first segment 

 purplish-black, second and third segments subopaque olive-greenish, 

 anal segment polished metallic dark green; that of male all most 

 highly pohshed except first segment, the sides broadly clear light 

 rufous to middle of third segment, rest deep dark metallic greenish 

 with occasional suggestions of purplish. Legs black. Wings lightly 

 smoky, more deeply so along costal border; alulae and tegulae dilute 

 honey-yellow, the hind scale sometimes shading to whitish on disk. 



Holotype. — Cat. No. 19450, U.S.N.M., female. Allotype, male. 

 Paratypes include TD 3953, female. 



MAKASINOCERA, new genus. 



Genotype. — Makasinocera unguis, new species. 



Differs from Archytas as follows : 



Male. — Second anteniial joint longer than third. Third antennal 

 joint extremely moccasinlike in shape as seen in profile, very strongly 

 convex on front edge, narrowed apically. Second aristal jomt very 

 elongate, four or more times as long as wide. Cheeks three-fourths 

 of eye-height. Scutellum with five pairs of margmal bristles, a 

 decussate apical pair, and an erect subapical pair. Anal segment 

 with marginal, submarginal, and discal rows of macrochaetae. Front 



