LIST OF DIPTERA. 757 



at the tip, nearly twice the length of the second ; bristle much 

 longer than the third joint, its first joint very short; second joint 

 long, more than twice the length of the first ; third joint very stout 

 for lull one-third of its length, slender from thence to the tip : abdo- 

 men obconical, shining, a little longer than the chest ; hind borders 

 of the segments ferruginous on each side: legs black, clothed with 

 black hairs and bristles ; shanks ferruginous ; foot-cushions tawny : 

 wings slightly gray ; wing-ribs tawny ; veins black, tawny at the 

 base ; tip cross-vein forming with the fourth longitudinal vein an 

 obtuse angle, which is near to the border of the wing, very slightly 

 curved inward along its whole length, joining the border a little 

 above the tip of the wing ; lower cross-vein with two very slight 

 curves, the lower inward, the other outward ; scales yellowish, with 

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

 lines. 

 a. ? From Mr. Children's collection. 



Tachina Clesides, n. s. Fusco-cinerea, subcenea, palpis antennisque 

 nigris, horum articulo 3° basi ferrugineo, pedibus nigris, alls 

 subcinereis basi subflavis. 



Body black, with a slight brassy tinge, especially on the abdo- 

 men, covered with brownish gray down, very thickly beset with long 

 stout black bristles : head dull ; sides of the face fringed with bris- 

 tles ; epistoma not prominent : sucker black, clothed towards the 

 tip with short tawny hairs ; palpi black : eyes pitchy, not hairy : 

 feelers black, very short, about half the length of the face ; third 

 joint ferruginous at the base, nearly linear, flat above, slightly con- 

 vex beneath, truncated at the tip, about twice the length of the se- 

 cond joint : first and second joints of the bristle very short ; third 

 joint rather thick for about one-third of its length, slender from 

 thence to the tip : chest and abdomen slightly shining : abdomen 

 nearly elliptical, much longer than the chest: legs black, clothed 

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

 slightly gray, with a yellowish tinge at the base ; wing-ribs tawny ; 

 veins pitchy ; tip cross-vein forming a right angle with the fourth 

 longitudinal vein, curved inward near the base, straight from thence 

 to the tip, united with the third longitudinal vein before the tip of 

 the latter, which joins the wing-border at some distance above its 

 tip; lower cross-vein very slightly waving; scales pale yellow. 

 Length of the body 3 lines ; of the wings 5 lines. 



a. North America. Presented by the Entomological Club. 



