2 PROCEEDINGS OF THE NATIONAL. MUSEUM vol.76 



0.33, 0.36, 0.33) ; inner orbits parallel from vertex to base of antennae. 

 Parafrontal wider than median vitta, which is blackish and extends 

 on each side of ocellar triangle to inner vertical. Ocellars small, 

 proclinate. Inner and outer verticals well developed. Frontals in 

 two rows stopping at base of antennae. Orbitals two pairs. An- 

 tennae brown, tinged with yellow basally, second joint about one- 

 half length of third, which is straight on the anterior edge and 

 densely covered with whitish pubescence. Arista brownish, thick- 

 ened only near base, sparsely short-haired on upper side about half- 

 way to tip, basal joints short. Parafacials silvery, bare, narrow, 

 diverging strongly below. Vibrissae at oral margin usually with 

 one strong and several smaller bristles above on facial ridges, which 

 are rounded and flattened. Facial depression rather shallow and 

 slightly convex but without a carina. Proboscis short, fleshy. 

 Palpi yellow to brownish black, smaller than usual, little or not at all 

 thickened apically, with several black bristles near the apex. 

 Cheeks about one-fourth the eye height, thinly pollinose on a red- 

 dish background, with a few short black bristles 'above the lower 

 marginal row. Occiput cinereous pollinose with only short black 

 bristles. 



Thorax and scutellum black, thinly pollinose, subshining, two 

 narrow vittae indistinctly visible before suture. Chaetotaxy : Acros- 

 tichal 0, 1 ; dorsocentral 2, 3 ; humeral 2 ; posthumeral 1 ; presutural 

 1; notopleural 2; supraalar 3 (small except middle one) ; intraalar 

 2; postalar 2; sternopleural 2; pteropleural 0; scutellum with one 

 large lateral and a decussate apical pair; postscutellum small; infras- 

 quamal hairs present ; halteres yellow ; calypters white. 



Abdomen with cinereous pollen tinged with brown on the subshin- 

 ing posterior margins of the first three segments. First segment 

 without median marginals; intermediate segments each with a com- 

 plete marginal row, no discal; fourth segment with a discal and a 

 marginal row ; genital segments blackish basally and yellow apically, 

 without piercer. 



Legs brownish yellow, except tarsi which are black; middle tibia 

 with one bristle on outer front side beyond middle; claws and pul- 

 villi short. 



Wings subhyaline, rather short and broad to tip; veins yellow, 

 bare except third, which has one large and a few small bristles at the 

 base; costal spine moderately long, usually doubled; fourth vein 

 broadly curved, bend without a definite angle; first posterior ceil 

 open or barely closed at or just before tip; hind cross vein about 

 midway between bend and small cross vein ; last section of fifth vein 

 about one-fifth the preceding. 



Length, 5 to Y mm. 



