DIPTERA. : 159 
brown along the borders of the veins ; poisers tawny ; their knobs black with 
a hoary tinge. Length of the body 3} lines; of the wings 5 lines. 
East India. 
THEREVA NIVARIA, Fem. 
Nigra, albo-hirta, pectore ventreque cinereis, abdominis segmentorum mar- 
_ ginibus posticis luridis, antennis pedibusque nigris, alis subcinereis. 
Body black, clothed with black hairs ; head clothed beneath with white 
hairs : sucker pitechy, 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 hairs on each side of the base: legs 
black, clothed with short black hairs, heset with a few black bristles ; foot; 
cushions pitchy: wings 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. 
Tuereva Inpioa, Fem. 
Nigra, pectore ventre abdominisque segmentorum marginibus posticis cine- 
reis, 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 much longer than the chest; ‘hind borders 
of the segments and underside tinged with gray : legs tawny, 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. 
A 
