Genera of African Musci'idea. 175 



Venter piile hrownisli. Lcp^.s l)lacki:ili bio>Yu. Wiiig.^ 

 iaiiitly iiifiiscated, to^^ulio nearly wliitc. 



llnlotypo, no. lU97b U.S. N. 11. 



Nanitil ill honour ot Mr. 1). \V. Snyder. 



OcYPTEKOillMA, gen. nov. 



Genotype, Ocypteromima polita, sp. n. 



llelatoil to the Aphiia-Kriotlirix series of groups, froin the 

 genera of which it may be distinguisiiod by the folh)\ving 

 cliaracters : — Female only : Front anteriorly about width of 

 eyp, gently narrowing to vertex; face widening therefrom at 

 same angle. Parafacials rather narrow, not as wide as third 

 antcnnal joint. Frontalia occupying nearly one-third of 

 frontal width posteriorly. No occllars. Inner verticals 

 strong, reclinate, not decussate ; no outer verticals. Two 

 proclinate and two reclinate fronto-orbitals. Only one frontal 

 below base of anteinia\ Second antennal joint only slightly 

 elongate; third narrow, of even width, about three times as 

 long as second. Arista slender, finely pubescent, a little 

 thickened on basal half, rather tapered, basal joints very 

 short. K})istonia produced, but vibrissie very close to oral 

 margin. Checks narrow, the eyes descending as low as 

 vibrissre. Eyes practically bare, only very faintly and 

 sparsely short-hairy. Proboscis rather short, but corneous, 

 part below geniculation hardly as long as lower border of 

 liead ; palpi slender, short, sublilit'orm. Two sterno-pleural.s 

 and three postsuturals. Scutellum without apical or discal 

 bristles, but with one long postero-lateial and one very short 

 antero-lateral. No discals on alxlonien, first two segments 

 with median marginal pair, last two with marginal row. 

 Abdomen subcylindrical, but swollen in middle, thence 

 tapering both ways. Legs slender, not very elongate. 

 Apical cell open, constricted apically, ending a little before 

 wing-tip. Cubitus abru})tly rounded ; hind cross-vein nearer 

 same, straight. Third vein biistiy nearly to small cross- 

 vein. No costal spine. 



Ocypteromima polila, sp. n. 



Length of body 8*5 mm., of wing 6*5 ram. 

 One female, Lorenzo AJarqucs, March 1, I'JIO (C. W. 

 Howard) . 



Black, silvery-white pollinosc. Anteniife l)lackish, fron- 

 talia daik brown. Palpi appearing black, but in reality deep 

 nitous, with many short black bristly hair?. Head all 



