256 DUKHAM DIPTERA. 



XXXIII. 454. 



As some of Meade's characters are not very satisfactory, 

 and some do not apply to the female, I give Stein's tables for 

 his Spilogaster, which includes Mydcea and one or two species 

 given under other genera in Verrall's list. The generic names 

 are altered to correspond with this list. Those without 

 numbers are not British. Numbers which follow refer back to 

 local species. 



Spilogaster-Mydcza, &c. (Males). 



1 (32). Legs quite black. 



2 (11). Dorsum black, without a trace of stripes or spots. 



3 (6). Abdomen without spots arranged in pairs. 



4 (5). Hind tibiae with a strong erect spine on the inner side 



before the tip. (!976. M. nigritella, Ztt.) 



5 (4). Hind tibiae without the above spine. 



M. vespertina, Fin. (1975) 



6 (8). Abdomen with spots arranged in pairs. 



7 (8). Mid tibiae with a strong bristle on the inner side. 



(1950. Hyedotesia dispar, Fin.) 



8 (7). Mid tibiae without an inner bristle. 



9 (10). Halteres black ; wings very dark at the base ; largish 



species. 4-6 mm. S. nigrinervis, Ztt. (1987) 



10 (9). Halteres brownish ; wings not remarkably dark at the 



base ; smaller species. 3 mm. (S. carbonella, Ztt.) 



11 (2). Dorsum more or less distinctly striped or spotted. 



12 (15). Dorsum spotted. 



13 (14). Dorsum with three spots • scutellum grey, black at 



the base. ( I 9^9. S. notata, Fin.) 



14 (13). Dorsum with four spots ; scutellum grey with a black 



spot on each side of the base. 



(1986. S. maculosa, Mg.) 



15 (12). Dorsum striped. 



16 (19). Dorsum indistinctly three-striped, i.e., the two centre 



stripes appear as if run together. 



17 (18). The whole length of the hind tibiae remarkably 



bristly. (S. platyptera, Ztt.) 



18 (17). Hind tibiae not remarkably bristly. 



(S. halterata, Stein) 



