178 DURHAM DIPTERA. 



XXVIII. 278. 



52 (51). Abdomen without this patch. 



53 (54). Legs with distinct orange markings. 



(1478. cynocephala, Lw.) 



54 (53). Legs almost all black. (1478^. carbonaria, Lw.) 



Females (Eyes widely separated). 



Figures after the name refer back to the table of males. 



1 (20). Eyes bare. 



2 (9). Legs black, with not more than the extreme knees, or 



the middle joints of the fore tarsi pale. 



3 (4). Third antennal joint orange. maculata, Fin. (1453) 



4 (3). Third antennal joint dark. 



5 (6). Middle joints of fore tarsi pale, albitar sis, Mg. (1471) 



6 (5). Fore tarsi entirely blackish. 



7 (8). Punctuation fine. Pubescence on the thorax some- 



what erect and golden. sparsa, Lw. (1454) 



8 (7). Punctuation coarse. Pubescence on the thorax de- 



pressed and greyish. 



9 (2). Legs with at least both ends of the tibiae pale. 



10 (11). Scutellar bristles absent. intonsa, Lw. (1464) 



11 (10). Scutellar bristles present. 



12 (17). Arista pubescent ; tip of the scutellum yellowish. 



13 (16). Central knob of the face very wide, so as to encroach 



on the eye margins ; legs extensively pale. 

 14(15). Third antennal joint small and brownish; thorax 

 finely punctate. (1457. scutellata, Fin.) 



15 (14). Third antennal joint large and orange; thorax 



coarsely punctate. (1458. soror, Ztt.) 



16 (13). Central knob of the face moderate ; legs and antennae 



nearly all dark. (!455' longida, Ztt.) 



17 (12). Arista almost bare ; tip of scutellum not in the least 



yellowish. 



18 (19). Third antennal joint blackish and moderate in size. 



(1475. mutabilis, Fin.) 



19 (18). Third antennal joint orange and very large. 



pulckripes, Lw. (1459) 



