LIST OF DIPTERA. 251 



white at the tips, fringed on the hind borders near the base; 



the black part includes some small, more or less, distinct tawny 



marks on the borders of the cross-veins ; wing-ribs and veins black ; 



poisers piceous. Length of the body 4 lines ; of the wings 12 



lines. 



a. South Africa. Presented by Dr. A. Smith. 



Anthrax vitriecosta, n. s. Nigra, thorace antico pilis flavis fasciato, 

 pedibus nigris, coxis femoribusque piceis, alls limpidis. 

 Head wanting : body rather narrow, black, shining, thinly 

 clothed with very short white hairs : front of the chest with a thick 

 band of pale yellow hairs : legs black, and clothed with black hairs ; 

 hips and thighs piceous : wings colourless ; wing-ribs and veins 

 tawny ; fore border veins slightly clouded with yellow ; poisers yel- 

 low. Length of the body 4-g- lines ; of the wings 9 lines. 

 a. ? 



Anthrax suffusa, n. s., fern. Picea, scutello ferrugineo, abdomine 

 subtw fulvo, pedibus fulvis, alis cinereis, basi costaque fuscis 

 fuscoque septem-maculatis. 



Body piceous : head covered with a few yellow hairs, hoary and 

 thinly clothed with white hairs behind : eyes bronze-colour: chest 

 thinly clothed with pale yellow hairs, and having a few black bristles 

 behind and on each side; scutcheon dark ferruginous; breast 

 covered with a hoary bloom and thinly clothed with white hairs : 

 abdomen covered with white down and yellow hairs, and having 

 a thin fringe of black hairs on each side ; under-side tawny, piceous 

 at the base, with the exception of the hind borders of the segments : 

 legs tawny, thinly beset with black hairs and bristles ; hips and tips 

 of feet piceous ; thighs with a slight hoary bloom : wings brown at 

 the base and along the fore borders till near the tips and for more 

 than half the breadth, with darker marks on the borders of the cross- 

 veins ; the other part is gray, which colour may also be traced on the 

 disks of some of the areolets on the border of the brown part, there 

 are seven brown spots on the gray, two of them at the tip, and five 

 along the hind border of the wing ; wing-ribs and veins piceous, the 

 latter black towards the tips ; poisers tawny. Length of the body 3 

 lines ; of the wings 7 lines. 

 a. ? 



Anthrax Simson, Fabr. Syst. Antl. 110, 5. Wied. Dipt. Exot. i. 

 122, 6. Auss. Zweif. i. 259, 9, Div. 2, pi. 3, /. 2. Macq. 

 Dipt. Exot. ii. 1, 59, 11. Nemotelus tigrinus, Deg. Ins. t. 29, 

 /. 11. Anthrax scripta, Say, Journ. Acad. Phil. 1822, 43, 3. 



a. Delaware. Presented by E. Doubleday, Esq. 



b. New York. 



