DXPTERA, 159 



brown along the borders of the veins ; poisers tawuy ; tbeir knobs black wilb 

 a hoary tinge. Length of the body 3^ lines ; of the wings 5 lines. 



East India. 



Thereva nivaria, Fern. 



Ai//rrt, albo-hirta, pectore ventreque clncrcis, abdominis segmentoriim mar- 

 ginibus posticis Ittridis, antennis pedibusque nigris, alis siibcinereis. 



Body black, clothed with black hairs : head clothed beneath with white 

 hairs : sucker pitchy, clothed with tawny hairs : breast and underside of 

 the abdomen gray, the former partly clothed with whitish hairs : abdomen 

 spindle-shaped, very much longer than the chest; hind borders of the seg- 

 ments lurid ; a large tuft of white haiis on each side of the base : legs 

 black, clothed with short black hairs, beset with a few black bristles ; foot- 

 cushions pitchy : tvings slightly gray ; wing-ribs pitchy ; veins black, 

 strongly marked, pitchy towards the base ; brands brown ; poisers pitchy. 

 Length of the body 5 lines ; of the wings 9 lines. 



East India. 



Thereva Indica, Feni. 



Nigra, pectore ventre abdominisque segmentoruni marginibus posticis cine- 

 7-eis, antennis nigris, pedibus fulvis, alis cinereis. 



Body black : head shining above, tinged with gray and clothed with 

 hoary hairs beneath : sucker and feelers black : breast tinged with gray : 

 abdomen spindle-shaped, very mucli longer than the chest ; hind borders 

 of the segments and underside tinged with gray : legs tanny, beset with a 

 few black bristles ; claws black : wings gray ; brands brown ; wing-ribs 

 pitchy ; veins black, pitchy at the base ; poisers pitchy. Length of the 

 body 5 lines; of the wings 9 lines. 



East India. 



