DURHAM DIPTERA. 343 



XLVI. 581. 



TABLES OP SPECIES. 



581. Sepsis, Fin. 



1 (2). Wings quite clear, without any spot at the point. 



583. Henicita, Westw. (2539. annulipes, Mg.) 



2 (1). Wings with a round black spot at the tip. 



3 (4). Abdomen golden green, red at the base ; legs entirely 



yellow. ( 2 5 2 3' punctum, F.) 



4 (3). Abdomen not red at the base. 



5 (6). Legs entirely yellow except a short black line on the 



femora above, and the tip of the tarsi ; X.5 2 nearly 

 as long as V.5 4 ; abdomen violet. 

 2525. Sepsis viola cea, Mg. 

 Bishop Auckland, 2 $, April-May, 1900-02. 



6 (5). At least the mid and hind legs black. 



7 (8) (9). Legs wholly black except the fore coxae. 



(2528. nigripes, Mg.) 



8 (7) (9). Legs with the knees, the fore coxae, and fore tibiae 



yellow ; wings with X.5 2 nearly as long as V.5 4 . 

 2526. Sepsis cynipsea, L. 

 Common everywhere. 



9 (7) (8). The fore legs entirely yellow except the tip of the 



tarsi; X.5 2 very short, about half the length of 

 V.5 4 . ( 2 5 2 7- flavimana, Mg.) 



582. Nemopoda, Dsv. 



1 (2). Wings towards the point with a faint but always 



distinct brown cloud; male fore femora beneath 

 with a few weak and short bristles, 

 2534. Nemopoda cylindrica, F. 

 Bishop Auckland, Hesleden, &c, 4 $ and 2 $, June- 

 August. 



2 (1). Wings quite clear; male fore femora beneath with 



two rather strong thorn-like bristles. 



(2535. stercoraria, Dsv.) 



