DURHAM DIPTERA. 327 



XLI. 541. 



6 (5). Wings mostly clear with dark spots or incomplete 



bands. 



7 (10). Face all orange. 



8 (9). The whole of the tip of the wing dark to beyond the 



end of V.3. The basal fore margin and two bands 

 dark as well as the tip. 



2383. Pteropcectria nigrina, Mg. 

 Hesleden, 1 ?, August, 1899. 



9 (8). The whole of the tip of the wing clear from the end 



of V.2. The basal fore margin and four patches 



dark. 



2382. Pteropcectria afflicta, Mg. 



Hesleden, 8 $ and 7 ?, August, 1899-1902. 



10 (7). Face shining black below, orange above. 



(2387. oscillans, Mg.) 



543. Ceroxys, Mcq. 



1 (4). Abdomen with shining black cross bands ; femora 



wholly, or at least at the base black. 



2 (3). Legs yellow with the bases of the femora black. 



(2390. crassipennis, F.) 



3 (2). Legs blackish with yellow knees. (2389. pictus, Mg.) 



4 (1). Abdomen unicolorous, without such bands ; femora 



all yellow. (239 1 - omissus, Mk.) 



544. Anacampta, Lw. 



1 (2). Base of the wing yellowish, none of the three wing 



bands broken. ( 2 39 2 - urttcce, L.) 



2 (1). Base of the wing not yellow, the third of the three 



. wing bands broken into two spots. 



(2393. hyalinata, Pz.) 



548. Ulidia, Mg. 



1 (2). Wings clear, at most with a pale brown tinge. 



(2397. erythropthalma, Mg.) 



2 (1). Wings deeply tinged with black, orange at the base. 



(2397^. ntgripennis, Lw.) 



