DTJKHAM DIPTERA. 1 79 



XXVIII. 278. 



20 (1). Eyes bearing obvious, even though short, pubescence. 



21 (30). Face bearing hairs, even though short and very 



inconspicuous, on the slopes (VII. 5), distinct 

 from any which may be on the eye margins. 



22 (23). Legs all black, at most dark brown at the knees. 



variabilis, Pz. (1460) 



23 (22). Legs partly pale, at least yellowish about the knees. 



24 (29). Wings without any conspicuous markings. 



25 (28). Antennae dark. 



26 (27). Arista and the scutellar bristles long. 



(1462. vulpina, Mg.) 



27 (26). Arista and the scutellar bristles remarkably short. 



(146 1. honesta, Rnd.) 



28 (25). Antennae pale. (1463. barbata, Lw.) 



29 (24). Wings darkened across the middle. Hairs of three 



colours. illustrata, Harr. (1465) 



30 (21). Face absolutely without hairs, except on the eye 



margins. 



31 (38). The black scutellar bristles absent. 



82 (38). Antennae blackish. (1466. grossa, Fin.) 



33 (82). Antennae yellowish. 



84 (37). Wings not clouded about the X-veins. 



35 (86). Femora almost all black. (1467. chrysocoma, Mg.) 



86 (35). Femora all orange. (1468. albipila, Mg.) 



37 (34). Wings clouded, at least about the X-veins. 



(1469. nebulosa, Verr.) 



38 (31). The black scutellar bristles present, at least traces. 



39 (40). Legs entirely black. impressa, Lw. (1470) 



40 (39). Legs with at least the base of the tibiae pale. 



41 (50). Tibiae and tarsi mostly black. 



42 (45). Tarsi almost all black. 



43(44). Scutellar bristles rather long. (1478^. carbonaria, Lw.) 



44 (43). Scutellar bristles short. Outer half of the wing 



darkened. (1478. cynocephala, Lw.) 



45 (42). Fore and mid tarsi distinctly pale on either the basal 



or middle joints. 



