LIST OF DIPTERA. 261 



hairs : feelers and mouth black, the former beset with black bristles 

 at the base : eyes red : breast clothed with brown hairs, and having 

 a tuft of red hairs near each wing-rib : abdomen clothed with ferru- 

 ginous hairs, and having on Ah side two or more transverse spots 

 of white hairs, which when not worn away, appear to form bands on 

 the back : legs black, clothed with black hairs and bristles: wings 

 colourless, yellowish brown at the base and along the fore borders 

 till near the tips ; wing-ribs and veins black ; poisers tawny, with 

 yellow tips. Length of the body 3J lines ; of the wings 8 lines. 



a. Sierra Leone. Presented by the Rev. D. F. Morgan. 



Anthrax subannulus, n. s., mas. Nigra, lateribus thoracis anticis 

 fulvo-pilosis, pectore ventreque piceis, abdomine pilis fulvis fas- 

 ciato, apice nigra piloso fasciculisque duabus argenteis ornato, 

 antennis nigris, pedibus piceis, alis limpidis basi fulvis. 



Body narrow, black ; its sides and the fore border of the chest 

 thickly clothed with bright tawny hairs : eyes red : feelers and 

 sucker black : breast piceous, with a slight hoary bloom : abdomen 

 with a band of bright tawny hairs on each segment; the tawny 

 hairs on the sides give place to black hairs towards the tip which is 

 adorned with two tufts of bright silver hairs ; under-side piceons : 

 legs piceous, beset with black hairs; thighs clothed with tawny 

 hairs : wings colourless, tawny at the base ; wing-ribs and veins pi- 

 ceous ; poisers yellow. Length of the body 4 lines ; of the wings 

 8 lines. 



Group XI. 



Like the ninth group, but the first submarginal vein has 

 a fork near its base. 



Anthrax purpurata ? Wied. Auss. Zweif. i. 300, 62. 

 a. ? 



Group XI I. 



Like the ninth group, but the vein that divides the first 

 from the second submarginal areolet has a short fork on its first 

 curve. 



Anthrax alterna, n. s. Fusca, pilis fulvis flavis albisque varia, 

 abdomine subtus cano fulvoque vittato, pedibus fulvo-piceis, alis 

 subcinereis, venis fusco nebulosis. 



Body rather broad : head and chest brow r n : head tawny about 

 the mouth, clothed in front with bright tawny hairs, and behind the 



