INSECUTOR INSCITI^ MKNSTRUUS 69 bend of fourth vein is far removed from hind margin of wing, being almost as close to the front as to the hind margin. Chaetocraniopsis chilensis, new species. Length of body, 10 mm. ; of wing, 6.5 mm. One male, Chile (E. C. Reed). Dark brown or blackish, parafrontals and parafacials silvery white pollinose, cheek grooves brownish rufous, palpi yellow, second antennal joint rufous, third antennal joint and fascial plate blackish with a faint silvery bloom, arista soft black. Mesoscutum thinly silvery, leaving four equal vittae ; scutellum pale fulvous, thinly silvery ; abdomen rather thickly silvery pollinose on second and third segments except narrow hind margin. Legs wholly blackish, hind tibise with unequal bristles, claws slightly longer than last tarsal joint. Wings nearly clear, showing no yellowish at base ; tegulas white. First and second abdominal segments of male with a median marginal pair of macrochaetse, the first segment with one lateral marginal, the second with two or three lateral marginal, the third and fourth with closely set marginal row. Apical pair of scutellar bristles rather short, erect ; three long lateral pairs, and one shorter discal pair. Front of male about as wide as both eyes, face slightly wider; facial depression deeply exca-vated, about as wide as parafacials ; cheeks of male a little less than one-half eye-height. Holotype, No. 19419, U. S. Nat. Mus. NEW PERUVIAN HYSTRICIINE FLIES By CHARLES H. T. TOWNSEND Neogymnomma, new genus. Differs from Gymnomma as follows: Cheeks of female about two-thirds eye-height. Parafacials with bristly hairs, one facio-orbital bristle present. No ocellar bristles. Third antennal joint no longer than the elongate second, very wide and truncate at end. Second aristal joint very elongate. No palpi. Front tarsi of female widened. Abdomen thickly beset with slightly curved subspinelike macrochc-eta, scutellum with same. Cubitus with wrinkle only.