DTTEHAM DIPTEKA. 117 



XXIII. 193. 



31 (32). The end of the fore tibiae, the fore metatarsi, the 

 inside of the mid femora, the outside of the mid 

 tibiae, and both sides of the hind femora and tibiae 

 feathered in the female. Wings brown. Male 

 organ with an upward-bent thread. 



1033. Empis pennipes, L. 

 Bishop Auckland, 1 $ , June, 1900; Brancepeth, 3 $, 

 June, 1902. 



82 (31). All femora and tibiae thickly feathered in the female. 



(1036. decora, Mg., ? ) 



83 (30). Legs with only ordinary hairs, not feathered. 



34 (39). Wings brown. 



35 (36). Stigma black. Femora and tibiae deeply ciliated. 



(1045. lepidopus, Mg.) 



36 (35). Stigma absent. Male organ with an upward-bent 



hook. 



37 (38). Mid femora and mid and hind tibiae with a row of 



bristles above and beneath. (1036. decora, Mg., <£) 



38 (37). Legs hairy, but not ciliated. (1032. brunnipennis, Mg.) 

 89 (34). Wings clear. Stigma absent. Male organ short, 



without a thread. Mid and hind femora and hind 

 tibiae ciliated in the female. 



1035. Empis vernalis, Mg. 

 Hesleden, Harperley, Bishop Auckland, 3 $ and 

 3 ?, June, 1900. 



40 (1). Species yellow, at least on the pleurae and humeri. 



41 (42). Thorax all yellow, unmarked. 



1028. Empis lutea, Mg. 

 Hesleden, 3 ?, August, 1902. 



42 (41). Dorsum with a black line or lines. 



43 (44) (47). Dorsum with one black line in the middle. 



1023. Empis stercorea, L. 

 Harperley, 1 ?, June, 1900, 1 ?, June, 1902; Shipley, 

 1 $; Shull, 1 ?, June, 1904; Hesleden, 1 ?, June, 

 1902. 



