Dec, 1915] Townsend: New Muscoidea. 221 



way or more to small crossvein. Scutellum with three pairs of 

 marginal macrochaetae, the apical pair decussate and moderately long ; 

 the middle pair extraordinarily long, curved and reaching to or 

 beyond base of third segment though suberect; two long straight 

 erect weak discal pairs, about as long as the front marginal and 

 shorter than the apical. Wings and abdomen both narrow. Male 

 abdomen with a median marginal pair of erect macrochaetae on each 

 of the four segments, a lateral marginal on segments one to three, 

 two or three lateral marginal on anal segment. Hairs of abdomen 

 rather short, appressed. Hind tibiae not ciliate, male claws about as 

 long as last tarsal joint; front metatarsi thickened, also front tibiae 

 distally. Spine at base of hind metatarsi, front ones with several 

 vestigial spines. Vibrissal angles not convergent, on oral margin, 

 latter cut off. 



Hesperophasia setosa new species. 



Length of body, scant 5 mm.; of wing, 3.5 mm. One male, Rio Ruidoso, 

 White Mts., New Mexico, 6500 ft., on flowers of Geranium atropurpureum, 

 August, 1898 (Townsend). 



Black, the front and face lightly silvery, the parafacials and parafrontals 

 with a row of shining black dots marking the origin of bristles, similar dots 

 less well defined also marking the origin of the anterior frontal bristles. 

 Antennae soft blackish, with faint grayish bloom ; palpi blackish. Mesoscutum, 

 scutellum and abdomen polished, with purplish luster, showing practically no 

 pollen or only the faintest trace on thorax in very oblique lights. Legs black, 

 femora brown, tibiae faintly tinged with brown. Wings clear except the smoky 

 costal and subcostal cells ; tegulae pale with fuscous borders. 



Holotype, No. 19561 U. S. N. M. 



HESPEROPHASIOPSIS new genus. 



Genotype, Hespcropliasiopsis calif ornica Townsend new species. 



Differs from Hesperophasia Townsend as follows : Sparse row of 

 weak bristly hairs on parafacials in front of orbital row. Second 

 antennal joint not so elongate, the third slightly longer than second. 

 Front of male narrowed in middle to about or nearly one fifth head 

 width, the borders arcuate, the front widening evenly to vertex as 

 well as to lunula. Parafacials broader and not in plane of facial 

 plate, normal. Cheeks quite one half eye height, or slightly more. 

 Antennae of male reaching little more than three fourths way to oral 

 margin. Hind crossvein practically parallel with apical, a little nearer 



