LIST OF DIPTERA. 779 



joints very short; third stout for full one-fourth of its length, very 

 slender from thence to the tip ; chest covered with dark gray 

 bloom: abdomen nearly elliptical, longer than the chest, covered 

 with hoary lustre, which is partly interrupted by a black stripe, and 

 by the black hind borders of the segments, and has a tessellated 

 •appearance : legs black, rather long, clothed with black hairs and 

 bristles ; shanks tawny ; foot-cushions dark tawny : wings slightly 

 gray ; wing-ribs pitchy ; veins black, tawny at the base ; tip cross- 

 vein forming a very obtuse angle with the fourth longitudinal vein, 

 irregularly and very slightly curved inward from the base to the tip, 

 joining the border at a short distance above the tip of the wing ; 

 lower cross-vein straight, with the exception of two short and slight 

 curves, the one inward and at the base, the other outward and at 

 the tip ; scales white, with pale yellow borders. Length of the body 

 3^ lines ; of the wings 7 lines. 

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



Tachina Demylus, n. s. Nigro-cinerea, capite Jlavo, thorace sub- 

 vittato, abdominis lateribus basifulvis, antennis ritfis, articulo 3° 

 nigro, palpis pedibusque fulvis, tar sis nigris, alis limpidis an- 



Body black, rather narrow, covered with gray bloom, clothed with 

 black hairs and bristles; head adorned with pale yellow lustre, pro- 

 minent about the base of the feelers, hoary and clothed with pale 

 yellow hairs beneath ; sides of the face fringed with bristles at the 

 base ; epistoma slightly prominent ; eyes bright red, not hairy ; 

 sucker ferruginous ; clothed with tawny hairs ; palpi tawny, slender, 

 beset with black bristles: feelers as long as the face; first and 

 second joints red; third black, red at the base, linear, narrow, 

 rounded at the tip, nearly four times the length of the second ; bristle 

 black, less than twice the length of the third joint, its first joint 

 obsolete, second very short; third stout for about one-fourth of the 

 length, very slender from thence to the tip : chest indistinctly striped 

 with darker colour : abdomeu nearly oval, not longer than the chest ; 

 a large tawny spot extends from the base to the middle on each side : 

 legs tawny, rather long, clothed with black hairs and bristles ; feet 

 black ; foot-cushions tawny : wings colourless, rather long and nar- 

 row; wing-ribs tawny; veins black, tawny towards the base; tip 

 cross-vein forming a very obtuse angle with the fourth longitudinal 

 vein, straight till near the tip, where it has a slight inward curve, 

 joining the border a little above the tip of the wing ; lower cross- 

 vein with two curves, one near the base short and inward, the other 

 longer, outward and near the tip ; scales white, with yellow borders. 

 Length of the body 3^ lines ; of the wings 8 lines. 

 a. North America ? Presented by the Entomological Club. 



