LIST OF DIPTERA. 909 



veins black, pitchy at the base ; tip cross-vein joined with the 

 fourth longitudinal vein by a rather deep outward curve, straight 

 from thence till near the tip, where it is slightly curved inward, 

 joining the border just below the tip of the wing ; lower cross-vein 

 curved inward along its whole length, deeply so near the base; 

 scales white, with pale tawny borders; poisers tawny, with yellow 

 knobs. Length of the body 4 lines; of the wings 8 lines. 

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

 G. Barnston, Esq. 



Musca Eustolia, n. s., mas. Aurea, capitefiavo, thorace vittis quin- 

 que nigro-fuscis, abdominc fuho, segmentorum marginibus pos- 

 licis fuscis, antennis piceis, palpis pedibusque fuscis, tarsis ni- 

 gris, alls subfulvis marginibus poslicis lirnpidis. 

 Body clothed with black hairs and bristles : head yellow ; a 

 narrow, dark brown stripe fringed with bristles between the eyelets 

 and the feelers ; epistoma prominent ; sides of the face fringed with 

 bristles along one-third of the length : eyes pitchy, nearly meeting 

 on the crown ; fore part almost flat, its facets larger than those else- 

 where : sucker black, clothed at the tip with tawny hairs ; palpi 

 tawny : feelers pitchy, nearly as long as the face ; third joint linear, 

 slightly rounded at the tip, full thrice the length of the second joint; 

 bristle tawny, black towards the tip, feathered with black hairs, 

 much longer than the third joint : chest gold-colour, adorned with 

 five regular, broad, blackish brown stripes ; the middle one and the 

 outer pair extending over part of the scutcheon : abdomen tawny, 

 obconical, a little shorter, but hardly broader than the chest ; hind 

 borders of the segments pale brown : legs tawny, clothed with black 

 hairs and bristles ; shanks darker than the thighs ; feet black ; foot- 

 cushions pale yellow : wings slightly tawny, colourless along the 

 hind borders ; wing-ribs lawny ; veins black, pitchy towards the 

 base ; tip cross-vein joined by a very shallow outward curve with 

 the fourth longitudinal vein, straight from thence till near the tip, 

 where it is very slightly inclined inward ; lower cross-vein with two 

 very slight and short outward curves, one at the base, the other at 

 the tip, the whole middle part being occupied by a long and shal- 

 low inward curve ; scales pale tawny. Length of the body 3 lines ; 

 of the wings 7 lines. 

 a. Sierra Leone. Presented by the Rev. D. F. Morgan. 



4 K 3 



