No. 2301. 2fEW SPECIES OF MU8C0ID FLIES— TOWNSEND. 581 



Tribe ARGYROPHYLACINI. 

 IMINTHOHOUGfflA, new genus. 



Genotype. — MintliohougJiia cylindrical new species. 



Head like HougMa. Clypeus deep, short. Facialia bare. Arista 

 short-pubescent. Eyes bare. Female vertex not one-third head 

 width. One frontal below base of antennae. Ocellars weak, 

 strongly divaricate, feebly proclinate, or even reclinate. Para- 

 facialia bare, narrowed below to a point. Cheeks about one-twelfth 

 eye length. Two sternopleurals, preacrostichals, and lateral scutel- 

 lars; three postintraalars and postsuturals ; postacrostichals present; 

 rather long decussate apical scutellar pair. Wings very short. 

 Costal spine strong. Third vein bristled to point about opposite 

 hind crossvein; others bare. Apical cell narrowly open considerably 

 before tip. Hind crossvein in middle. Abdomen like MintJio in 

 form. No median marginals on first segment, but a pair on second; 

 strong marginal rov/ on last two segments. 



MINTHOHOUGHIA CYLINDRICA, new species. 



Length, 5 to 6 mm. Two females, Luna, Peru, March 14, 1910, 

 on foliage (C. H. T. To-wmsend). 



Palpi very pale fulvous. Antennae blackish; second joint obscure 

 rufous. Head and thorax thickly pollinose, with distinct golden- 

 green tinge. Thoracic vittae scarcely perceptible. Abdomen shin- 

 ing rufous, bases of last three segments brassy-silvery; median vitta 

 and last two segments shming blackish; the vitta >road and widen- 

 ing behind on second segment; the third segment broadly rufous 

 on sides at base. Legs blackish. Wings nearly clear. Tegulae 

 whitish. 



Type.— Cat. No. 22256, U.S.N.M. 



CASAHUIRIA, new genus. 



Genotype. — CasaJiuir'ia cornuta, new species. 



Clypeus broad, long, deeply sunken. Epistoma cut off, scarcely 

 warped. Facialia strongly ciliate over haK way. Proboscis about 

 half head height, haustellum little longer than broad; palpi short, 

 broad and flattened in male. Third antennal joint of male eight 

 times second, wide. Arista bare. Eyes thinly short-hairy. Male 

 vertex about one-fourth head width. Two or three frontals below 

 base of antennae. Parafacialia very narrow, with some fine hairs 

 above next frontals. Cheeks one-fifth eye length. Three each 

 sternopleurals, postintraalars, postsuturals, preacrostichals, post- 

 acrostichals, and lateral scutellars; very weak apical scutellar pair . 

 Third vein with one long bristle at base, others bare. Apical cell 

 open a little before tip. Hind crossvein nearer to cubitus. Male 



