﻿50 Journal New York Ent. Soc. [Voi. in. 



Qymnopareia B. a?id B. To this genus belongs Thryptocera ameri- 

 cana Town. 



Lasioneura, n. gen. 



Front at vertex one-fourth wider than either eye, frontal bristles descending 

 about to base of second antennal joints, two pairs of orbital bristles in both sexes; face 

 perpendicular, lower part of head slightly longer than at base of antenna, sides of 

 face bare, each about one-fourth as wide as the median depression, the latter not cari- 

 nate in the middle; ridges nearly straight, moderately diverging, their lower ends 

 widely separated ; vibrissa; stout, inserted near the oral margin, only two or three 

 small bristles above each; cheeks from one-fourth to one-third as broad as height of 

 eyes. Antennae nearly as long as the face, the third joint three or four times as long 

 as the second; arista pubescent, the penultimate joint about as long as broad. Eyes 

 bare. Proboscis beyond the basal articulation shorter than height of head; palpi 

 well developed, sub-clavate. AbdoniL'n oval, of four segments which are sub-equal 

 in length, macrochxta; only marginal; genitalia slightly protruding in the male, hid- 

 den in the female. Hind tibix not ciliate. First vein partly or wholly bristly, third 

 bristly over halfway to the small crossvein, the others bare; apical cell open at tip 

 of wing, hind crossvein about midway between the small crossvein and the bend, 

 the latter arcuate, last section of fifth vein about one-fifth as long as the preceding 

 section. Type : 



Lasioneura johnsoni, sp. nov. 



$ — Front and face yellow, vittn next the antennae four times as wide as either 

 side of front. Proboscis black, palpi yellow. Antennae black, the first two joints 

 yellow; arista thickened on the basal three-fifths. Thorax black, gray pollinose, 

 marked with two brovi^n vitta;, three post sutural bristles ; scutellum black, two 

 pairs of long marginal macrochastce. Abdomen black, the broad lateral margins of 

 the first two segments and front angles of the third, yellow ; shining excepting the 

 gray pollinose bases of the last three segments ; first segment destitute of dorsal ma- 

 crochretie, second with a marginal pair, third and fourth each with a marginal row 

 of six. Femora yellow, tibia and tarsi brown, claws and pulvilli very small ; a 

 slender black spine at apex of each hind coxa. Wings hyaline, first vein bristly over 

 its entire length, the third bristly three-fourths of the distance to the small crossvein. 



$ Differs from the $ in having yellow of abdomen confined to the first seg- 

 ment and front angles of the second. Length 5 mm. 



Washington. Two specimens from Prof. O. B. Johnson, after 

 whom the species is named. 



Lasioneura palloris, sp. nov. 



9 — Difters fromyci/;«5o«z as follows: Wholly yellow, abdomen shining, the 

 base semi-transparent, the apex sometimes tinged with brown; tarsi brownish. 

 Frontal vitta next the antenna; twice as wide as either side of front. Arista of 

 antennae thickened on the basal two-fifths. Thorax gray pollinose, destitute of brown 

 vittce ; four post-sutural macrochcetae ; scutellum bearing three long marginal and a 



