320 rROCEEBINGS OF THE NATIONAL MUSEUM. tol. 51. 



DIATRAEOPHAGA, new genus. 



Genotype. — Diatraeophaga striatalis, new species. 



Female. Form narrowed. Front strongly produced in profile, 

 face very receding; head sub triangular in profile. Vertex fully one- 

 third head-width; parafrontals and parafacials wide, the latter nar- 

 rowed considerably below. One reclinate and two proclinate orbi- 

 tals. Ocellars present. Frontals descending but slightly below 

 base of antennae. Frontalia narrow. Facial depression very deeply 

 hollowed, vibrissae on oral margin; facialia on edge and forming sides 

 of depression, their crests flush with parafacials, bristled less than 

 halfway up. Antennae about as long as facial plate, second joint 

 short, upper edge of third joint prolonged into a point at tip. Arista 

 swollen on basal three-fifths, second joint well elongated. Epistoma 

 cut off, notched. Proboscis short, palpi normal. Two sternopleu- 

 rals; four postsuturals, but the front two weak. Three lateral scu- 

 tellars, a weak divergent apical pair, a weaker discal pair. Abdo- 

 men with a weak median mai'ginal pair on second segment, and weak 

 marginal on third and anal segments. Hind tibiae with sparse irregu- 

 lar bristles. Tarsi short, the metatarsi as long as remaining joints 

 taken together. Claws rather short. Apical cell moderately short- 

 petiolate, ending well before tip. Apical and hind cross veins slightly 

 curved and about parallel. Cubitus without stump, right-angled, 

 hind cross vein well removed therefrom. Costal spine present, third 

 vein with one rather long bristle at base. 



DIATRAEOPHAGA STRIATALIS, new species. 



Length of body, 8 mm, ; of wing, slightly over 5 mm. One female, 

 Pasoeroean, Java, August, 1913, reared from Diatraea striatalis (K. W. 

 Dammerman, No. 385). 



Very dark brown to black. The specimen is badly gi'eased and 

 shows no pollen, but the head, thorax, and bases of abdominal seg- 

 ments are almost certainly silvery to some extent in life. The tips 

 of palpi and base of antennae show faintly rufous, the cheeks and 

 broad margins of parafacials rather more so. Wings nearly clear. 

 Tegulae whitish. 



Eolotype.—^o. 20049, U.S.N.M. 



The economic importance of this form justifies its description from 

 this specimen. 



METOPOSISYROPS, new genus. 



Genotype. — Metoposisyrops oryzae, new species. 



Differs from Diatraeopliaga female as follows: Male. Front even 

 more strongly produced in profile; the parafacials much narrower 

 below and their profile more bulged, their planes almost at right 

 angles with that of clypeus. Vertex a little less than one-third head- 



