6 PROCEEDINGS OF THE NATIONAL MUSEUM vol.72 



the uppermost strongly divergent and reclinate, those below converg- 

 ent, the lowest two or three extending down on the face and pro- 

 clinate, the uppermost one of these being at the level of the base of 

 the third antennal joint. About four pairs of proclinate orbital 

 bristles present, the uppermost small and close to the divergent 

 frontals, the lowest opposite insertion of antennae nearly in line 

 with the proclinate frontals. Parafrontal narrow above, the median 

 stripe very wide ; just above the antennae however the stripe is only 

 as wide as one parafrontal. Parafacial moderately wide with 

 numerous smallish black hairs. Cheek about one-fourth the eye 

 height, bare except below and posteriorly. Mouth a little protuber- 

 ant so that the length of the head here is equal to that at the inser- 

 tion of the antennae. Facial ridges bare, face flat transversely. 

 Vibrissae at the oral margin arising from a cluster of smaller bristles ; 

 antennae fully three-fourths as long as face; second antennal joint 

 about two-thirds as long as the third ; arista short, thickened nearly 

 to the tip, the basal joints short. Palpi normal ; proboscis short, but 

 quite slender beyond the joint. Back of head a little bulging, with 

 only white hair except the orbital row and a few dark hairs near 

 the mouth. Thoracic chaetotaxy : acrostichal, 3, 3 ( ? ) ; dorsocentral, 

 3, 4; humeral, 4; posthumeral, 2; presutural, 2; notopleural, 2; su- 

 praalar, 3 (the middle large) ; intraalar, 2 ; postalar, 2 ; sternopleural, 

 2, 1; pteropleural, 0; scutellum with three marginal, no apical, but 

 scars indicating 2 pairs of bristles irregularly placed just above the 

 apex. 



Abdomen rather thick toward apex, no median marginals on 

 first segment, second with one pair but no discals, third with a mar- 

 ginal row of about 10, no discals; fourth with a marginal row 

 smaller and a subdiscal row about at the last third. Legs black, 

 rather stout and bristly; pulvilli moderately elongated; middle 

 tibia with three or four stout bristles on outer front side, hind tibia 

 with irreg-ular and unequal bristles on outer hind side and inner 

 hind side. 



Wing subhyaline, first posterior cell ending far before the apex, 

 first vein with coarse hairs to the tip, third vein with siniilar hairs 

 extending beyond the cross vein; bend of fourth vein angular and 

 slightly appendiculate ; last section of fifth vein about one-third the 

 preceding. 



General color dark gray, the head subsilvery; palpi and second 

 antennal joint reddish-yellow; stripes of mesonotum considerably 

 damaged in the specimen but apparently not distinct. Abdomen 

 l)luish-gray on second and third segments, not tessellated, the hind 

 margins shining black, fourth segment almost entirely shining black. 

 Genitalia rather large, concealed in the specimen. 



Length, 9 mm. 



Not represented in the National Museum. 



