434 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.49. 



nose. Wings nearly clear, faintly smoky-gray. Tegulae tawny- 

 white, the small front scale more nearly white. 

 Holotype.— Cat. No. 19455, U.S.N.M. TD 4126. 



OOMEIGENIA, new genus. 



Genotype. — -Oomeigenia chosica, new species. 



Runs to Pentamyia in Brauer and Bergenstamm's tables, but 

 apical scutellar setae are wanting. Facialia broad, crests ciliate 

 about or nearly liaKway up with curved bristles that grow weaker 

 in their upper extent. Eyes of female very sparsely short-hairy. 

 Front and face of female absolutely equilateral, about one and one- 

 fifth times eye- width. Parafacials narrowing to a line just above 

 vibrissae. Eyes descending fully to vibrissal angles; latter closely 

 approximated to the broad, cut-off and feebly prominent oral mar- 

 gin. Second antennal joint short, third reacliing almost to oral 

 margin; arista thickened on basal half, becoming abruptly hairUke 

 near middle, basal joints very short. Proboscis short and fleshy; 

 palpi elongate, bowed, not stout but conspicuously thickened on tips. 

 Frontal bristles descending to base of third antennal joint, the pair 

 opposite lunula decussate, next pair reclinate; two strong recUnate 

 inner orbitals beliind these, in line with same; two strong prochnate 

 outer orbitals, with two or three weak proclinate ones interspersed 

 in row with them; the strong ones not quite as strong as the anterior 

 inner orbital, which is nearly equal to the inner vertical. Outer 

 vertical bristle long, but weaker and shorter than inner. Strong 

 proclinate-divaricate pair of ocellar bristles, about equaling outer 

 orbitals. Frontaha very wide, taldng up fully half the width of the 

 front in middle. Antennae inserted well above eye-middle. Apical 

 cell closed in margin about as far before extreme wing tip as half 

 length of hind crossvein. Fourth vein abruptly bent at rounded 

 angle, without stump or wrinkle. Hind crossvein nearer bend. 

 Three strong lateral scutellar macrochaetae, and a weak short sub- 

 discal pair. First abdominal segment with a median marginal pair 

 of long macrochaetae; second with short weak' erect discal pair 

 hardly distinguishable from the bristly hairs, and four median mar- 

 ginal long macrochaetae. Third segment with four short erect 

 median discal in transverse row, and marginal row of long strong 

 macrochaetae; anal segment with complete transverse discal row of 

 short erect macrochaetae, and marginal row of long ones. Three 

 sternopleural and three postsutural bristles. Legs of moderate 

 length; claws of middle and hind legs of female short but well devel- 

 oped, those of front feet distinctly vestigial, the front tarsal joints 

 quite normal and unmodified. The genus bears no close affinity 

 with Meigenia, but resembles that genus in type of reproductive 

 habit and egg. 



