228 Records of the Indian Museum. [Vol. Ill, 



spots, the anterior one small and conical, the other two more 

 elongate. There is also an indistinct central line between the 

 median pair of narrow ones, and a small spot above the insertion 

 of the wings. Sides of thorax, cinereous grey. Scutellum yel- 

 lowish grey, with some yellow hairs as in cf . 



Abdomen black, bare, posterior margin of segment rather 

 broadly yellow, sides with a little less hair than in & . Belly 

 blackish. Ovipositor pale yellow, inconspicuous. 



Legs and wings as in cf . 



Described ( o' 9 ) from several of both sexes taken by Dr. 

 Annandale at Simla, 16-V-09, where it was common on Sednmrosii- 

 latum (white stone-crop) ; the species was not seen an^'^where 

 except on this plant. 



Usia marginata, mihi, sp. nov. 



& . Simla. Long. 4 mm. 



Head. — Eyes contiguous for a shorter space than in sedophila, 

 black, bare ; upper facets larger than lower, and more sharply 

 defined from one another than in sedoph'la. Frons ash-grey, 

 small, with a few black hairs. Vertex prominent, with some 

 black hairs, ocelli distinct. Front margins of eyes and cheeks 

 with long black hair, which is considerably thicker on the under 

 side, and which extends over the whole of the back of the head. 

 Antennse as in sedophila, but the third joint with a pale ring at the 

 base, giving the appearance of a minute basal joint, and the tip 

 bears on its upper side a minute style-like process, just be3'ond 

 the sub- apical depression. First joint with some bristly black 

 hairs, second with one or two minute hairs, third bare. 



Thorax dull black, almost velvety, covered lightly on dor- 

 sum, and more thickly in front and at sides with long black hairs. 

 Anterior margin of thorax broadly whitish grey, which in the 

 centre is produced posteriorly into four narrow stripes, of which 

 the outer pair just reach the suture, the inner pair being very 

 slightly shorter. Sides of thorax black, with long black hairs, and 

 the whitish grey colour of the anterior margin of dorsum extends 

 downwards somewhat below the shoulders. 



Abdomen dull black, posterior margins of segments nar- 

 rowly yellowish, with the colour continued over the sides and 

 across the belly. A row of grey hairs on posterior border of seg- 

 ments, and the sides of the abdomen with rather thick whitish 

 grey hair. Belly concolorous. 



Legs black , minutely pubescent ; femora with rather long 

 soft black hair on upper and lower sides ; hind tibiae very shortly 

 bristly. 



Wings nearly clear; subcostal cell ver}'^ pale yellow. Hal- 

 teres pale brown, clubs chalk-white. 



Described from one cf taken by Dr. Annandale at Simla 

 (16-V-09) in company with the previous species. 



