646 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 56, 



at 45°. Epistoma narrowed from clypeas, elongate, and in plane of 

 lower part of clypeus; the oral margin and vibrissal angles prominent 

 in profile. Facialia bare, much bowed. Vibrissae very strongly 

 decussate. Proboscis nearly head height; palpi nearly twice as long 

 as antennae and considerably swollen distally. Third antennal joint 

 one and one-fourth times second. Arista nearly one and one-half 

 times as long as antennae; swollen only at base, pubescent. Eyes 

 thinly hairy. Female vertex one-third head width. Three to four 

 proclinate fronto-orbitals in female. Parafacialia wider than clypeus, 

 setose in three irregular rows. Cheeks nearly two-thirds eye length. 

 Five to six sternopleurals, four strong; three postsuturals; two postin- 

 traalars; preacrostichals and postacrostichals present. Third vein 

 bristled only at base; others bare. Apical cell widely open well before 

 tip. Hind cross vein much nearer to cubitus. Middle metatarsi 

 nearly as long as following joints together. No median marginals on 

 first segment, but two pairs on second segment, marginal row on last 

 two segments; median discal pair on third segment. 



MEGAEULOEWIA MORINIOIDES, new species. 



Length, 8 mm. One female, Rio Vaca, Pecos National Forest, New 

 Mexico, 8,500 feet, August 27, 1916 (C. H. T. Townsend). 



Shining jet black. Head very thinly silvery, varying to blackish 

 in changing lights. Frontalia light brown. Face and cheek grooves 

 brownish-rufous; antennae more rufous. Palpi fuscous, paler distally 

 Mesoscutum very faintly pollmose; the vittae obsolete. Abdomen 

 not pollinose. Wings clear, faintly yellowish costobasally. Tegulae 

 nearly white. 



Type.— Cut. No. 22218, U.S.N.M. 



Tribe MORINIINI. 

 STEVENIOPSIS, new genus. 



Genotype. — Steveniopsis sinuata, new species. 



General Moriniine characters. Form very narrow. Head of 

 Paramacronychia, but epistoma rather wide and arista short. Eyes 

 bare. Arista long-pubescent or short-plumose. Parafacialia nearly 

 as wide as clypeus; setose in three rows, the three to five lowest 

 bristles of outermost row strong. Two preacrostichals and lateral 

 scutellars; three postintraalars, postsuturals, and postacrostichals; 

 four or five sternopleurals; rather long divaricate apical scutellar 

 pair. Costal spine very strong. Third vein bristled nearly or quite 

 one-third way to small crossvein, others bare. Apical cell long- 

 petiolate, ending far before tip, the petiole about twice as long as 

 small crossvein. Hind crossvein a little nearer to cubitus, latter half 

 way between the front and hind wing margins. Apical crossvein sin- 

 uate. Abdomen cylindroconical. Median marginal pair on first two 



