LIST OF DIPTERA. 995 



beyond this a brown, slightly curved band extends across the wing, 

 includes the lower cross-vein, and on the fore border joins a brown 

 stripe, which passes to the tip of the wing ; wing-ribs and veins 

 black ; veins mostly tawny in the colourless parts of the wing ; 

 lower cross-vein curved in the lower part of its course, nearly per- 

 pendicular, distant by much more than its length from the middle 

 cross-vein, which is oblique ; longitudinal veins straight ; poisers 

 tawny. Length of the body 1^ line ; of the wings 3 lines. 

 a. North Bengal. From Miss Campbell's collection. 



Ortalis ? diopsides, Barnstons MSS., fem. Nigra, obscura, ca- 

 pite antico fulvo, palpis antennis pedibusque piceo-ferrugineis, 

 alis subcinereis ad costam fusco bimaculatis. 



Body dull black, clothed with very short black hairs : head 

 beset with a few black bristles, tawny in front and beneath, where it 

 is covered with white bloom ; sides of the face without bristles ; 

 epistoma slightly prominent : eyes dark red ; facets of the fore part 

 a little larger than those elsewhere : sucker and palpi ferruginous, 

 partly pitchy ; sucker clothed with tawny hairs ; palpi beset with 

 black bristles: feelers ferruginous, shorter than the face; third joint 

 pitchy above, nearly round, longer than the second joint ; bristle 

 black, bare, slender, much more than twice the length of the third 

 joint : abdomen spindle-shaped, much longer than the chest ; last 

 segment flat : legs pitchy, mostly ferruginous beneath, clothed with 

 very short black hairs ; claws black : wings slightly gray, with a 

 narrow pitchy band at half the length of the fore border, on which, 

 near the tip, there is a small brown spot ; wing-ribs tawny ; veins 

 black, tawny at the base ; longitudinal veins straight ; lower cross- 

 vein straight, slightly oblique, nearly twice its length distant from 

 the middle cross-vein ; poisers pale tawny. Length of the body 2 

 lines ; of the wings 3^ lines. 

 a. St. Martin's Falls, Albany Eiver, Hudson's Bay. Presented by 



G. Barnston, Esq. 



Ortalis ? costalis, n. s., fem. Nigra, abdomine nigro-ceneo, pedi- 

 bus nigris, alis limpidis ad costam fusco bimaculatis, stigmate 

 nigro. 



Head wanting : chest dull black, beset with a very few black 

 bristles: abdomen sessile, brassy black, shining, slightly spindle- 

 shaped, much longer but hardly broader than the chest : legs black, 

 clothed with very short black hairs : wings colourless, with a small 

 brown spot just above the tip, and another at the base of the fore 

 border, where the vein is thickened ; a black band along the mid- 



