258 DTJKHAM DIPTEBA. 



XXXIII. 454. 



41 (42). Second abdominal segment without hind-marginal 



bristles ; inner side of hind femora with scattered 

 strong bristles. M. urbana, Mg. (1978) 



42 (41). Second abdominal segment with hind-marginal 



bristles ; inner side of hind femora with fine, 

 almost shaggy hairs. (1979. M. angelicce, Scop.) 



43 (38). Abdomen unmarked, or with paired spots. 



44 (47). Hind femora entirely yellow. 



45 (46). Four post-sutural bristles. (S. pubescens, Stein) 



46 (45). Three post-sutural bristles. {S. demigrans, Ztt.) 



47 (44). Hind femora wholly or partly black. 



48 (55). Arista distinctly long haired. 



49 (52). All tibiae orange. 



50 (51). Fore tibiae with one, or at most two bristles on the 



middle ; wings yellow at the base ; abdominal spots 

 longish, generally only one pair; large pale grey 

 species. ( x 994« S. quadrum, F.) 



51 (50). Fore tibiae with two or three bristles ; wings nearly 



quite clear ; abdominal spots round, generally three 

 pairs ; small dark grey species. (S. calceata, Rnd.) 



52 (49). Fore tibiae partly or wholly dark. 



53 (54). Fore tibiae with one long bristle on the middle. 



(S. ccesia, Mcq.) S. communis, Dsv. (1992) 



54 (53). Fore tibiae without bristles. S. duplicata, Mg. (1991) 



55 (48). Arista short haired or pubescent. 



56 (61). Hind femora wholly or mostly black. 



57 (58). X-veins very broadly clouded. (S. cothurnata, Rnd.) 



58 (57). X-veins not at all, or only slightly clouded. 



59 (60). Eyes almost touching ; hind tibiae remarkably bristly. 



(1995. S. fratercula, Ztt.) 



60 (59). Eyes rather broadly separated ; hind tibiae with the 



usual bristles. i 21 ! 1 - Caricea exsul, Ztt.) 



61 (56). Hind femora entirely yellow. 



62(63). Four post-sutural bristles. (2003. S. pertusa, M.g.) 



63 (62). Three post-sutural bristles. (2002. S. consimilis, Fin.) 



64 (33). Legs entirely yellow. 



