LIST OF DIPTERA. 517 



S argus tenebrifer, n. s., fem. Niger, clypeo Jiavo, scutelli margine 

 postico fulvo, abdominis segmentomm marginibus posticis albo- 

 pilosis, segmento 2°Jlavo maculis tribus nigris, antennis pedibus- 

 que nigris, tibiis anticis basiflavis, alis nigro-fuscis. 



Body black : head clothed with black hairs : clypeus yellow : 

 eyes piceous ; its facets rather larger in front than elsewhere : feel- 

 ers black : chest finely punctured, clothed with tawny down ; hind 

 border of scutcheon tawny : abdomen oval, very convex, broader and 

 longer than the chest, rather narrow towards the base ; sides of the 

 hind borders of the segments clothed with white hairs ; second seg- 

 ment yellow, having above a large black spot in the middle, and a 

 short black stripe on each side : legs black, clothed with black 

 down; fore shanks yellow towards the base ; wings blackish brown, 

 with a slight tawny tinge along the fore borders ; wing-ribs and veins 

 black ; poisers tawny. Length of the body 5 — 6 lines ; of the wings 

 10—12 lines. 



a. China. Presened by G. T. Lay, Esq. 



b. ? 



Sargus metallinus, Fabr. Syst. Antl. 258, 11. Wied. Auss. Ziveif. 



ii. 36, 16. 

 a, Nepaul. From the Hardwicke bequest. 



Sargus stamineus, Wied. Auss. Zweif. i. 39, 21. Scseva staminea, 



Fabr. Syst. Antl. 253, 19. 

 a. Para. Presented by Reginald Graham, Esq. 



Sargus elongatus. Musca elongata, Fabr. Ent. Syst. iv. 338, 

 109. 



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



b. West Africa. Presented by Sir E. Belcher. 



c. ? 



Sargus testaceus, Fabr. Syst. Antl. 257, 6. Wied. Auss. Zweif. ii. 



15. Macq. Dipt. Exot. i. 203, 5. 

 a. Brazil. 



Sargus Alchidas, n. s., mas. Viridis, abdomine cupreo pili§ fulvis 

 fasciato, antennis pedibusque fulvis , alis subfulvis. 



Head and chest bright green, clothed with short black hairs : 

 head a little broader than the chest : eyes bronze ; facets very 

 small: mouth tawny: feelers pale tawny; bristle black : abdomen 

 bright copper colour, varied with green, increasing in breadth from 

 the base to the tip, narrower than the chest, and nearly twice its 



