DURHAM DIPTERA. 27 I 



XXXIII. 465. 



17 (16). Dorsum indistinctly striped or unstriped. 



18 (19). The middle of the under side of the abdomen with a 



long tuft of hairs. ( 2 °73- penicillaris, Rnd.) 



19 (18). Ventral surface without tuft. (2065. antiqua, Mg.) 



20 (15). Eyes of the male quite touching. 



(2061. nigrescens, Rnd.) 



21 (12). Abdomen narrow and conical. 



22 (25). Large species, 6 mm. X-veins not clouded. 



23 (24). Dorsum brownish black, with an indistinct black 



central stripe ; wings clear. (2063. cinerella, Mg.) 



24 (23). Dorsum yellow-grey with five stripes ; wings darkish. 



(2056. spinosa, Rnd.?) 



25 (22). Smaller species, 3-4 mm. X-veins slightly clouded. 



2062. Hylemyia pulhila, Ztt. 

 Hesleden, 3 $ , August, 1900. 



26 (1). Legs pale, or partly pale. 



27 (37). Arista with long hairs. 



28 (36). Dorsum distinctly striped. 



29 (30) (33). Dorsum with two stripes. (2070. puella, Mg.) 



30 (29) (33). Dorsum with three stripes. 



31 (32). Legs with only the tibiae pale. 



2067. Hylemyia slrigosa, F. 

 Common everywhere. 12 $ and 8 ?. 



32 (31). Legs with the mid and hind femora, as well as all the 



tibia?, pale. 



2068. Hylemyia nigrimana, Mg. 

 Stanhope, 2 $, May, 1900; Bishop Auckland, 1 £ 

 and 1 $, June, 1900. 



33 (29) (30). Dorsum with four stripes. 



34 (35). Femora and tibiae all pale. (2069. prcepotens, W.) 



35 (34). Only the tibiae pale. (2071. operosa, Mg.) 



36 (28). Dorsum indistinctly striped. 



2072. Hylemyia coarctata, Fin. 

 Hesleden, 3 $ , August, 1900. 



37 (27). Arista short haired. (2074. criniventris, Ztt.) 



