﻿98 Journal New York Ent. Soc. [Voi. iir. 



8. Cheeks nearly as broad as the eye-height Paraphyto, gen. nov. 



Cheeks less than half as broad as the eye-height ... 9. 



9. Apical cell ending close to the extreme wing-tip Myiobia DesT. 



Apical cell ending far in front of the wing-tip 10. 



10. Hind tibiae outwardly rather densely ciliate with short bristles of nearly an equal 



length Argyrophylax B. B. 



Hind tibice uneiiually bristly, not ciliate Gymnoprosopa Town. 



Chfetoplagia, gen. nov. 



First, third and fifth veins bristly ; hind crossvein slightly beyond the middle 

 between the small and the bend, the latter rectangular and appendiculate; posterior 

 end of hind crossvein midway between the small and the tip of the fifth vein; 

 apical cell open, ending midway between the second vein and extreme tip of wing. 

 Frontal bristles in a single row, descending on sides of face nearly to the cheeks ; 

 anterior ocellar bristles directed obliquely forward ; antenna as long as the face, 

 the third joint five times as long as the second; arista bare, the penultimate joint not 

 longer than broad ; face in profile slightly convex, each side at narrowest point 

 about one-eighth as wide as the median depression, sparsely covered with bristly 

 hairs; ridges straight, widely diverging below; vibrissa widely separated, inserted 

 on the oral margin, only two or three bristles above each ; cheeks one-sixth as wide 

 as the eye-height ; eyes bare ; proboscis fleshy, the portion beyond the basal articula- 

 tion shorter than height of head ; labella large ; palpi well-developed, subclavate. 

 Abdomen subcylindrical of four segments. Hind tibia; not ciliate. Type, the fol- 

 lowing species : 



Chaetoplagia atripennis, sp. nov. 



9 — Black, the second antennal joint and palpi brownish yellow. Front at 

 vertex twice as wide as either eye, sides of front and face silvery pollinose ; frontal 

 bristles curving more or less backward, those below the arista directed downward ; 

 arista thickened on the basal two-thirds. Thorax lightly grayish pollinose, the front 

 end marked with four black vittre ; three postsutural and three sternoplural macro- 

 chsetse, the scutellum bearing a long marginal and shorter basal and apical pair. 

 Abdomen shining, bases of the last three segments whitish pollinose ; first segment 

 destitute of dorsal macrochceife, the second bearing a marginal pair, third with a 

 marginal row, the fourth with a discal and a marginal row. Wings blackish, hind 

 margin gray, middle of the submarginal, apical and discal cells, grayish, a subhya- 

 line streak above the third vein near its base ; first vein bristly nearly its entire 

 length, the third bristly to beyond apex of discal cell, fifth vein bristly to last fourth 

 of this cell; calypteres white. Length 7 mm. 



WestVille, N. J., July 2, 1S92 (C. W. Johnson); and Dist. Co- 

 lumbia, July, 1894, captured by the writer. Two specimens. 



Metachaeta, gen. nov. 



First and third veins bristly, the others bare; apical cell closed and petiolate, the 

 petiole more than half as long as the hind crossvein, the latter perpendicular, midway 

 .between the small cross vein and the bend which is rectangular; posterior end of hind 



