12 PROCEEDINGS OF THE NATIONAL MUSEUM vol.81 



the posterior pair of dorsocentral, far apart. Scutellum with three 

 pairs. Sternopleural with one posterior. The long fulvous pile 

 covers the mesopleura, propleura, and sternopleura, leaving the 

 pteropleura and all behind it bare. Calypters with fulvous rim 

 and marginal hairs, which are very long on the fold. 



Abdomen black in ground color, with very striking long dense 

 fulvous hair, which seems even more brightly fulvous than that of 

 the sides of the body and the femora. This dense covering extends 

 over the sides of the abdomen and even somewhat underneath, so 

 that no bare area below is visible. 



Legs reddish yellow, the coxae and basal three-fourths or more of 

 femora black. Coxae with dense long fulvous pile to the outer hind 

 side of the middle ones, this area and all the outer side of the hind 

 ones bare; femora and tibiae with the same pile as the pleurae, but 

 it is mainly black close to the apices of the femora, and considerably 

 mixed with black on the extensor side of all the tibiae. Tarsi with 

 comparatively short black hair above, about as long as the depth of 

 the segment. Pulvilli brown, claws black. The middle tibia has 

 two spines on the anterodorsal side, three or four on the postero- 

 dorsal, two on the posteroventral, and one on the anteroventral, not 

 including the apicals. The hind tibiae have three spines on the 

 anterodorsal and two on the posterodorsal. None of the femora have 

 spines. 



The wings are distinctly yellow, more intense near base. 



Length, 12-15 mm. 



FeTnale. — The characteristic red color of front, parafacials, and 

 cheek as in male ; the pile, which is so striking in the male, is reduced 

 to insignificant size, though present. The mesonotum is deep ful- 

 vous, with the following chaetotaxy : Acrostichal, 4 delicate rows 

 of hairs ; dorsocentral, 2, 3 ; humeral, 2 ; presutural, 1 ; notopleural, 2 ; 

 supraalar, 2; intraalar, 1 far back; postalar, 2; sternopleural, 0, 1; 

 scutellum, with 2 pairs marginal. Abdomen depressed, with dense 

 gray pollen, seventh segment wholly shining, except hind edge, 

 which is notched in the middle above. Legs reddish yellow, only the 

 front femora a little black above. No bristles on front femora; 

 middles ones with two on front side beyond middle and two near 

 together near tip on hind side; hind femora with irregular row of 

 about six small on anterodorsal side. Front tibiae with two bristles 

 on front side; middle tibiae with two anterodorsal, two postero- 

 dorsal, and one anteroventral; hind tibiae with three anterodorsal 

 and posterodorsal. 



Length, 9 mm. 



Type.—M^\Q, U.S.N.M. No. 43G92, from Yu Long Gong, Tibet, 

 August 1, 1923. Allotype from same lot. 



