220 Journal New York Entomological Society. [Voi. xxiii, 



longer, those of female strong but slender, those of male head hairlike 

 except vibrissse. Eyes thickly hairy in both sexes. Front strongly 

 produced, the head profile very suggestive of that of Eutrixa but the 

 front more produced; male vertex about one sixth of head width, or 

 a little less; female vertex less than one third head width; frontalia 

 much broader. Third antennal joint hardly longer than second in 

 both sexes, second joint thickly set with short sharp spines; arista 

 thickened on basal third. Cheeks over one half eye height in both 

 sexes. Vibrissae double, set well above oral margin. Palpi very 

 slender, subfiliform. Only two lateral scutellars, apical pair decussate 

 and long but weak. Abdominal macrochjetae rather thickly placed 

 over whole tergum, erect and very long, curved, only a lateral bare 

 space on each side of front portion which is smaller in male than in 

 female. Venter with fine hairs. Legs very spinose, male femora 

 more hairy, male claws very long. Wings narrow in both sexes, 

 costal spine small, veins heavy; apical cell narrowly open or almost 

 closed, ending well before wing tip; apical crossvein deeply bowed in; 

 usually strong stump at cubitus which is sharply angled. Abdomen 

 about same width as thorax in both sexes. 



Family MELANOPHORID.^. 

 HESPEROPHASIA new genus. 



Genotype, Hcsperophasia sctosa Townsend new species. 



Differs from Hespcromyia BB. as follows: Peristomal and frontal 

 bristles about equal, delicate; a row of three or four proclinate fronto- 

 orbital bristles in male continued on parafacials to lower border of 

 eyes, all noticeably stronger than the frontals. Plane of parafacials 

 almost same as that of facial plate. Second antennal joint fully as 

 long as third, or slightly longer ; arista very delicate, distinctly swollen 

 on extreme base. Front of male narrowed on more than posterior 

 half to little over one-eighth head width. Antennae of male nearly 

 reaching oral margin. Front in profile scarcely bulged, the face con- 

 spicuously receding. Cheek-grooves extending narrowly upwardbehind 

 eyes. Hind cross vein straight, about in middle between small crossvein 

 and bend of fourth ; only the final course of apical crossvein nearly 

 or quite parallel with same; crossveins far from parallel with inner 

 wing-margin; fourth vein without stump at bend, third bristly half 



