102 DURHAM DIPTERA. 



XVII. 158. 



158. Leptis, F. 



Larvae have been found on beetles and in damp earth. 



1 (4). Wings distinctly spotted. 



2 (3). Scutellum and pleurae grey in the male ; dorsum grey 



in the female. 



922. Leptis scolopacea, L. 

 Gibside, 1 $, Bishop Auckland, 1 $, 21-6-99, 1 ?, 

 1 0-6-0 1 ; Wearhead, 1 <£, 5-6-01 ; Waskerley, 2 $, 

 6-7-01. 



3 (2). Scutellum and pleurae yellow in the male; dorsum 



yellow in the female. (9 2 3- strigosa, Mg.) 



4 (1). Wings not distinctly spotted. 



5 (10). Large species, more than 9 mm. 



6 (7). Stigma large and distinct. (9 2 4- notata, Mg.) 



7 (6). Stigma faint or absent. 



8 (9). Coxae yellow. 



925. Leptis tringaria, L. 

 Apparently rare. I have only taken one female in 

 this neighbourhood. 



9 (8). Coxae dark, with whitish grey dust. 



927. Leptis conspicua, Mg. 

 Common at Hesleden in August. 



10 (5). Small species, less than 7 mm. Stigma distinct. 



928. Leptis lineolciy F. 

 Apparently rare. I have only taken one male in 

 this district. 



159. Chrysopilus, Mcq. 



1 (2). Legs all yellow. (929. aureus, Mg.) 



2 (1). Legs with at least the femora black. 



930. Chrysopilus auratus, F. 

 Common in marshy places. 



160. Atherix, Mg. 

 1 (2). Legs black. (93 1 - marginata, F.) 



