37^ DURHAM DIPTERA. 



LIV. 652. 



652. Napomyza, Hal. 



2 (3). Abdomen mostly yellow with dark bands; pleurae 



yellow. 

 2 759"2- Napomyza elegans, Mg., var. f estiva, Mg. 

 (First antennal joint yellow). 

 Bedburn, i ?, June, 1905. 



3 (2). Abdomen and pleurae dark with narrow yellow bands. 



2759. Napomyza lateralis, Fin. 

 Hesleden, 1 ?, August, 1900. 



4 (1). No X-veins on V.5. (V. 38). 



653. Phytomyza, Fin. 



5 (12). Species with more than the pleurae and the scutellum 



yellow. 



6 (11). Dorsum not striped. 



7 (10). Third antennal joint black with at most the extreme 



base yellow. 



8 (9). Dorsum and scutellum grey ; abdomen yellow. 



(2768. flaviventris, Ztt.) 



9 (8). Dorsum orange with only a dark grey spot on the 



mid-front. 



2767. Phytomyza flav 'a, Fin. 

 Bishop Auckland, 1 $, July, 1900. 



10 (7). Third antennal joint yellow, with at most the front 



edge brownish ; dorsum grey ; scutellum yellow. 



(2765. analis, Ztt.) 



11 (6). Dorsum with three broad yellow stripes. 



(2769. populicola, Wlk.) 



12 (5). Species chiefly black or dark grey. 



13 (16). Frons entirely black. 



14 (15). Face pale yellow; wings whitish. 



(2762. albipennis, Fin.) 



15 (14). Face black; wings clear. 



(2772. Chromatomyia obscurella, Fin.) 



16 (13). Frons wholly or mostly yellow. 



17 (18) (21). Legs wholly yellow. (2764. rufipes, Mg.) 



