358 DURHAM DIPTERA. 



L. 



4 (3). Costa reaching to V.4. 



5 (8). The hind tibiae at least with a distinct prseapical 



bristle. 



6 (7). Abdomen rather narrow; wings comparatively long 



and narrow, reaching very far over the abdomen. 



Scaptomyza, Hardy (620) 



7 (6). Abdomen rather plump; wings comparatively short 



and broad, reaching moderately far over the 

 abdomen. Drosophila, Fin. (631) 



8 (5). All tibiae without a prasapical bristle. 



622. Noterophila, Rnd. (2676. glabra, Fin.) 



9 (2). Arista bare. 



623. Aulacigaster, Mcq. (2677. rufitarsis, Mcq.) 

 10 (1). X.5 1 present. Stegana, Mg. (625) 



TABLES OF SPECIES. 



620. Scaptomyza, Hardy. 



1 (4). Entirely yellow with white face. 



2 (3). Dorsum slightly hoary with a faint brown stripe. 



(2660. flaveola, Mg.) 



3 (2). Dorsum entirely yellow. (2662. flava, Fin.) 



4 (1). Dorsum grey; abdomen dark. 



5 (6). Antennae all yellow. (2661. graminum, Fin.) 



6 (5). Antennas brown ; very slender species. 



(2663. gracilis, Wlk.) 



621. Drosophila, Fin. 



1 (10). V.4 2 at most half as long as V.4 3 . 



2 (5). X-veins clouded. 



3 (4). Abdomen with four rows of black spots. 



(2664. transversa, Fin.) 



4 (3). Abdomen with black bands, broadly broken in the 



middle. (2665. phalerata, Mg.) 



5 (2). X-veins not clouded. 



6 (7). Wings on the outer fore margin with a brown cloud. 



(2670. tristis, Fin.) 



7 (6). Wings quite unmarked. 



