DUEHAM DIPTEEA. 113 



XXIII. 191. 



13 (16). Antennae unicolorous, wings brownish in both sexes. 



14 (15) (15£). Hind legs furrowed, wings uniformly brown. 



995. Ramphomyia sulcata, Fin. 

 Common. Hesleden, Bishop Auckland, Escomb, 

 Waskerley, $ and ? , June-July. 



16 (14) (15^). Hind legs not furrowed, wings brown with a 

 black mark on the hind margin. 6 mm. 



(996. cinerascens, Mg.) 



15£ (14) (16). Hind legs not furrowed, wings dark brown, 

 darker on the costa. 4 mm. {fuscipennis, Ztt.) 



In Verrall's list 1001 is given fumipennis, Ztt. There is no 

 such name in Zetterstedt, but there is fuscipennis, Ztt., and 

 fascipennis, Ztt. See Nos. 15^ and 29 of this table. 



16 (13). Antennae with yellow base, wings of the male clear. 



(997. albosegmentata, Ztt.) 



17 (12). Male hind femora with thornlike processes beneath. 



(998. spinipes, Fin.) 



18 (4). Small species, 2-4 mm. Thorax grey, scarcely 



marked, or, shining black. 



19 (20). Wings with a dark streak in the middle. 



(1006. atra, Mg.) 



20 (19). Wings without a dark middle streak, milky or nearly 



clear. 



21 (28). Legs not plumed. 



22 (23). Wings with O. open, a X-vein being awanting. 



(1008. anomalipennis, Ztt.) 



23 (22). Wings with O. complete. 



24 (25). Male hind femora with two teeth, hind tibiae with one 



tooth. 



999. Ramphomyia dentipes, TAX. 

 Bishop Auckland, 4 $ and 1 ? , June-July, 1901. 



25 (24). Male hind legs normal. 



26 (27). Stigma present. Legs all black. Anal thread in the 



male absent. (1007. simplex, Ztt.) 



