710 LIST OF DIPTERA. 



the tip, which joins the border at some distance above the tip of the 

 wing ; lower cross-vein with two distinct curves, the lower inward, 

 the upper outward ; scales pale tawny. Length of the body 6 lines ; 

 of the wings 12 lines. 

 a. ? 



Group XIII. 



Third joint of the feelers nearly twice the length of the second, 

 rather deep, flat above, slightly convex beneath, truncated at the tip; 

 second joint of the bristle very short, but longer than the first. 



Tachina Alcis, n. s. Fulva, thoracis vittis quatuor nigris, abdomine 

 maculis nigris ornato, antennis pedib usque nigris, femoribus sub- 

 tus tibiisque fulvis, alis cinereis fulvo vittatis. 

 Head tawny, partly covered with whitish bloom, black above, 

 beset with a few black bristles, clothed beneath with yellow hairs ; 

 epistoma very prominent ; no bristles on the sides of the face ; 

 sucker black, pitchy, and clothed with yellow hairs towards the tip ; 

 palpi tawny, slender, rather long, clothed with a few long tawny 

 hairs ; eyes red, varied with black : feelers black, hardly as long as 

 the face ; third joint nearly twice the length of the second, rather 

 deep, flat above, convex beneath, truncated at the tip ; bristle 

 downy, twice the length of the third feeler-joint, rather thick for two- 

 thirds of the length from the base, slender thence to the tip ; second 

 joint of moderate length, longer than the first: chest and breast 

 black, covered with a dark tawny bloom : chest clothed with black 

 hairs and bristles, adorned with four slender black stripes ; breast 

 partly clothed with tawny hairs : scutcheon tawny, beset with long, 

 slender black spines : abdomen tawny, clothed with black hairs, 

 aimed with black spines, which are mostly towards the tips, adorned 

 above and below with a row of black spots, which increase in 

 breadth i'rom the base to the tip : legs black, clothed with black 

 hairs and bristles ; thighs beneath and shanks tawny : wings gray, 

 tawny towards the base and along the fore borders and on the sides 

 of the veins ; wing-ribs and veins tawny; veins pitchy towards the 

 tips ; tip cross-vein forming a very acute angle with the fourth longi- 

 tudinal vein, much curved inward near the base, straight from 

 thence to the tip, which joins the border at some distance above the 

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

 and inward, the upper outward and more slight ; scales yellowish 

 white. Length of the body 6 lines; of the wings 12 lines. 



