570 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 56. 



third way to small crossvein; others bare. Apical cell open con- 

 siderably before tip. Hind crossvein a little nearer to cubitus, 

 Male claws not as long as last tarsal joint. Abdomen subcylin- 

 drical. Median marginal pair on first two segments; median discal 

 pair on intermediate segments; marginal row on last two; submar- 

 ginal and discal rows on anal. 



AUBAEANETIA ASSIMILIS, new species. 



Length, 6.5 to 7 mm. One male and one female, Franconia, New 

 Hampshire, July 21 and 27, 1915, on foliage in woods (C. H. T. 

 Townsend). 



Shining black, more or less silvery. Palpi fulvous, darker basally. 

 Antennae blackish. Frontalia brown. Rest of head silvery, with 

 blackish reflections in varying light; occiput ashy. Thorax and 

 abdomen shining, with silvery pollen thinly spread on former and 

 on bases of last three segments of latter. Four indistinct black 

 vittae on thorax before suture. Wings clear. Tegulae whitish. 



Tyjje.—C&t. No. 22244, U.S.N.M. 



STOMATOLYDELLA, new genus. 



Genotype. — Stomatolydella infernalis, new species. 



Clypeus moderately sunken, not twice as long as wide. Epistoma 

 short, well warped. Facialia ciliate to lowest frontals. Proboscis 

 hardly two-thirds head height. Palpi stout, bowed, rather short. 

 Third antennal joint over three times second, narrow. Arista 

 crooked, pubescent. Eyes pilose. Male vertex one-fourth head 

 width, the front nearly equilateral on posterior half or so. Two 

 frontals below base of antemiae. Two proclinate fronto-orbitals in 

 male. Ocellars absent. Parafacialia bare, scarcely one-third as 

 wide as clypeus, narrowing below. Cheeks less than one-fifth eye 

 length. Three sternopleurals, postintraalars, postsuturals, pre- 

 acrostichals, postacrostichals, and lateral scutellars; a pair of scars 

 indicates a small apical pair. Third vein bristled only at base, 

 others bare. Apical cell narrowly open a little before tip. Hind 

 crossvein nearer to cubitus. Middle and hind metatarsi as long 

 as following joints together. Hind tibiae pectinate on basal half, 

 the bristles on distal half shorter. Abdominal macrochaetae short 

 and weak; median marginal pair on first two segments, marginal 

 row on third longer than others, anal segment with weak bristles 

 over disk. 



STOMATOLYDELLA INFERNALIS, new species. 



Length, 6 mm. One male. Hell Canyon, Manzano Mountains, 

 New Mexico, 7,200 feet, September 19, 1916, on foliage of scrub- 

 oak (C. H. T. Townsend). 



