754 LIST OF DIPTER.A. 



curved along the whole length, joining the border a little above the 

 tip of the wing; lower cross-vein nearly straight, but very slightly 

 waving ; scales dingy. Length of the body 2\ lines ; of the wings 

 4^ lines. 

 a. North America. Presented by the Entomological Club. 



Tachina Pyste, n. s. Cinerea, capile albo micante, abdomine cano 

 micante basi segmentorum marginibus posticis vittaque dor salt 

 nigris, palpis antennisque fulvis, horum articulo 3° piceo, pedibus 

 nigris, femoribus piceis, alls subcinereis. 



Body black, covered with gray bloom, clothed with black hairs 

 and bristles : head adorned in front with white silky lustre, clothed 

 beneath with hoary hairs ; a ferruginous stripe between the eyelets 

 and the feelers ; sides of the face without bristles ; epistoma 

 not prominent : sucker black, pitchy, and clothed with tawny hairs 

 at the tip ; palpi tawny, short, beset with black bristles: eyes brassy, 

 hairy : feelers tawny, as long as the face ; third joint pitchy above 

 and at the tip, much longer than the second joint, slightly convex 

 above, flat and downy beneath, somewhat rounded at the tip ; bris- 

 tle black, nearly twice the length of the third joint, its first joint ob- 

 solete ; second joint very short ; third joint rather stout for one- 

 fourth of the length, very slender from thence to the tip : abdomen 

 nearly oval, not longer than the chest ; first segment black ; second 

 and following segments varied with hoary lustre, which prevails 

 chiefly along the fore borders of the segments, and is interrupted on 

 the hind borders, and by a black stripe on the back, and by a black 

 space round tbe base of each bristle : legs black, clothed with black 

 hairs and bristles ; thighs and foot-cushions pitchy : wings slightly 

 gray ; wing-ribs pitchy ; veins black ; tip cross-vein forming an ob- 

 tuse angle with the fourth longitudinal vein, very slightly covered 

 along the whole length, joining the border at some distance above 

 the tip of the wing ; lower cross-vein with two curves, the lower in- 

 ward, longer than the other which is outward ; scales white, with 

 pale yellow borders. Length of the body 2 lines ; of the wings 4 

 lines. 

 a. Nova Scotia. From Lieut. Kedman's collection. 



Tachina Ambivius, n. s. Nigro-cinerea, capite plumbeo, abdomine 

 fasciis latis subinterruptis canis, palpis antennisque piceis, pedi- 

 bus nigris, alis sublimpidis. 



Body black, slightly covered with gray bloom, clothed with 

 black hairs and bristles : head covered with bluish gray lustre, hav- 

 ing a hoary stripe between the eyelets and the feelers, and a ferru- 



