2 26 DURHAM DIPTERA. 



XXXI. 363. 



11 (10). Abdomen black with red sides, and the two middle 



segments with light fore marginal bands. 



373. Rhynchista, Rnd. (17 71. prolixa, Mg.) 



12 (9). Shining black species. 



13 (14). Wings orange at the base, with a dark brown stripe 



on the fore margin. 

 364. Macroprosopa, Br. & Berg. (1750. atrata, Mg.) 



14 (13). Wings not orange at the base and evenly clouded. 



366. Ptilops, Rnd. (1752. chalybeata, Mg.) 



367- Anthracomyia, Rnd. 



1 (2). X.5 2 very near X.4. (1754. nana, Mg.) 



2 (1). X.5 2 at the middle between X.4. and the bend of 



V.4., or nearer the latter. 



3 (4). Wings darkened; abdominal bristles very fine, the 



middle segments almost bare. 



(1753. melanoptera, Mg.) 



4 (3). Wings clear, or nearly so ; abdominal bristles strong, 



and present on middle segments. 



(1755. anthracina, Mg.) 



368. Degeeria, Mg. 



1 (2). V.4, bent at an angle. (1 759. grandicornis, Ztt.) 



2 (1). V.4. bent in a curve. 



3 (4). Dorsum before the suture white with black marks, 



quite black behind, the division sharp. 



(1756. ornata, Mg.) 



4 (3). Dorsum all black with white shoulders or pale 



dusting, which is not sharply bounded with black. 



389. Trichopareia, Br. & Berg. 



5 (6). Grey species, dorsum with four brownish stripes. 



1808. Trichopareia seria, Mg. 

 Bishop Auckland, 1 ?, July, 1902. 



6 (5). Shining black species, dorsum bright, dusted with 



white, and with two broad stripes. 



(1807. blanda, Fin.) 





