LIST OF DIPTERA. 787 



the lower inward, the upper outward ; scale white, with yellow 

 borders. Length of the body 3^ lines ; of the wings 7 lines. 

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

 G. Barnston, Esq. 



Tachina Pansa, n. s. Picea, capite flavo-albo micante, thoracis 

 lateribus vittisque tribus canis, abdomine cano trifasciato, palpis 

 fulvis, antennis, pedibusque nigris, alls subcinereis. 



Body pitchy, clothed with black hairs and bristles ; head covered 

 with yellowish-white lustre, clothed beneath with pale yellow hairs, 

 having a tawny hue on each side of the crown, the middle part ol* 

 which is occupied by a pitchy stripe between the eyelets and the 

 feelers ; sides of the face tawny, fringed with black bristles for full 

 half the length from the base : a tawny band on each side between 

 the face and the eyes ; epistoma slightly prominent ; eyes dark red, 

 not hairy : sucker black, pitchy and clothed with tawny hairs ; 

 palpi tawny, slender, beset with black bristles : feelers black, a little 

 shorter than the face ; third.joint a little more than twice the length 

 ol the second joint, flat above, slightly convex beneath, rounded at 

 the tip ; bristle rather less than twice the length of the third joint ; 

 its first joint obsolete ; second very short ; third stout for more than 

 one-third of its length, very slender from thence to the tip : chest 

 adorned with three slender hoary stripes ; sides hoary ; scutcheon 

 ferruginous; abdomen obconical, longer than the chest, adorned 

 with three hoary bands on the fore borders of the segments ; first 

 and second bands narrow above, broad on each side ; third band 

 broad, and sending forth a short stripe towards the tip : legs black, 

 clothed with black hairs and bristles ; foot-cushions tawny : wings 

 slightly gray ; wing-ribs tawny ; veins black, tawny towards the 

 base ; tip cross-vein forming a very obtuse angle with the fourth 

 longitudinal vein, very slightly curved inward near the base, almost 

 straight from thence to the tip, which joins the border at some dis- 

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

 the lower inward, the upper shorter and outward. Length of the 

 body 6 — 7 lines ; of the wings 11 — 12 lines. 



Var. /3. The inward curve of the lower cross-vein shorter and 

 more distinct than the outward. 



Var. y. Lower cross-vein slightly waving for half its length, 

 straight from thence to the tip. 



a. North America. Presented by the Entomological Club. 



b. Nova Scotia. 



Var. 6\? Body pitchy, clothed with black hairs and bristles: 

 head covered with a pale tawny, shining, silk-like covering, thickly 



3 z 2 



