276 DURHAM DIPTERA. 



XXXIII. 471. 



33 (21) (32). Thorax grey. 



34 (35). Abdomen with a central row of small triangular 



spots. ( 2II 5- cepetorum, Mde.) 



35 (34). Abdomen with a row of large subquadrangular 



spots. {trapezoides, Ztt.) 



472. Pegomyia, Dsv. 



1 (20). Abdomen wholly or chiefly black or grey. 



2 (10). It is a male. 



3 (4) (9). Legs all pale except the tarsi ; palpi and antennae 



black. (setaria, W.) 



4 (3) (9). Fore femora at least partly dark. 



5 (6). Palpi and antennas black; abdomen grey with re- 



flections, and two subanal black processes. 



(2 1 2 1. hcemorrhoum, Ztt.) 



6 (5). Palpi yellow with black tips. 



7 (8). Antennae all black; abdomen light grey with large 



reddish subanal appendages. 



(2 1 19. conformis, Fin.) 



8 (7). Antennae with the basal joints yellow ; abdomen grey 



with a row of triangular spots ; anal segment 

 yellow. {hyoscyami, Pz.) 



9 (3) (4). All femora dark ; antennae black ; palpi yellow with 



black tips ; abdomen grey with row of black spots. 



(2 1 18. betce, Curt.) 



10 (2). It is a female. 



11 (16). Legs all pale except the tarsi. 



12 (13). Palpi and antennae all black. (setaria, W.) 



13 (12). Palpi and antennae yellow at the base, black at the 



tip. 



14 (15). Abdomen light grey and unmarked. 



(2 1 19. conformis, Fin.) 



15 (14). Abdomen grey with a row of small black spots ; anal 



segment yellowish. (hyoscyami, Pz.) 



16 (11). At least fore femora partly dark. 



17 (18) (19). Abdomen grey with the anal segments red or 



yellow. (2 1 2 1. hcemorrhoum, Ztt.) 



