64 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 51 



Tribe Metopiini 

 Genus Hilarella Rondani 



The cheeks in this genus are about one-fourth eye height, para- 

 facials with a row of bristles to lower eye margin, arista pubescent 

 or hairy, front sharply produced in profile. Opsidia is much closer 

 to Hilarella than is Bumacronychia. 



Tri be Hi m acri > n vc h 1 1 x 1 

 Genus Eumacronychia Townsend 



Bumacronychia decens Townsend. — This species is the type of 

 the genus, which has cheeks about one-half eye height in width. 

 parafacials bare of bristles, frontal bristles stopping at base of an- 

 tenna;. 



Genus Gymnoprosopa Townsend 



Gymnoprosopa polita, argentifrons, and clarifrons are perfectly 

 distinct, in spite of the note in the catalogue. They may be recog- 

 nized by the descriptions. 



SPHENOMETOPA, gen. nov. 



This genus is proposed for Araba nebulosa Coquillett. The speci- 

 mens from which this species was described were collected in the 

 vicinity of Meadow Valley, six or eight miles south of Colonia Gar- 

 cia, in the Sierra Madre of western Chihuahua, on the head of the 

 Rio Piedras Verdes, in the pine zone, about 7,000 to 7,500 feet 

 (Townsend). The form is not referable to Araba. 



The genus may be known by the front being conspicuously nar- 

 rowed anteriorly, the parafacials Aery narrow and bare, the vibrissa 

 quite distinct, and the front not produced conically like Mctopia and 

 Araba. It comes near to Metopodia in the latter character. The 

 wings are slightly clouded on the veins. 



Subfamily PsEUDODEXHN^ 



EUCALODEXIA, gen. nov. 



This genus is proposed for Homode.ria flaz'ipcs Bigot. It may be 

 recognized from the characters pointed out by Brauer (Sitzungsber. 

 Kais. Akad. Wiss., evil, i. p. 515), who failed to give it a name. 



Genus Atrophopoda Townsend and allies 

 The following new genera are here proposed : 

 DIAPHOROPEZA, gen. nov. 

 Type, Atrophopoda braueri 'Williston. 



