374 DURHAM DIPTERA. 



LIII. 646. 



7 (2). V.4. as distinct as the others. 



8 (17). Frons all or mostly yellow. 



9 (10). Species mostly yellow. 



2733. Agromyza lutea, Mg. 

 Hesleden, 1 ?, Aug. 5, 1902. 



10 (9). Species mostly black, at least above. 



11 (12). Legs wholly yellow. 



2734. Agromyza pusilla, Mg. 

 Bishop Auckland, 1 $, June, 1901. 



12 (11). Legs mostly black. 



13 (14). Antennae, pleurae, and scutellum yellow. 



2736. Agromyza fiaveola, Fin. 

 Bishop Auckland, 1 $, August, 1904. 



14 (13). Antennas, pleurae, and scutellum black. 



15 (16). V.4 4 four times V.4 3 ; legs black with a yellowish 



stripe. ( 2 743- geniculata, Fin.) 



16 (15). V.4 4 ten times V.4 3 j legs all black. (2738. extgua, Mg.) 



17 (8). Frons black, or black and grey. 



18 (19). Large species, 2-2^ mm. ( 2 735- nigrifies, Mg.) 



19 (18). Small species, 1 mm. 



20 (21). Frons black; hind tibiae normal. (2737. nana, Mg.) 



21 (20). Frons grey, black striped ; hind tibiae dilated ; convex 



on the outer side. ( 2 739« latipes, Mg.) 



22 (1). Halteres black or brown ; frons blackish grey, with a 



matt-black M -shaped stripe. 

 645. Desmometopa, Lw. (2729. M-atrum, Mg.) 



648. Liomyza, Mcq. 



1 (2). Frons black. ( 2 745- glabricula, Mg.) 



2 (1). Frons orange. (2746. flavipes, Fin.) 



649. Leucopis, Mg. 



Larvae live on hides, &c, and in galls of other insects. 



1 (2). Fore tarsi all black. (2749. griseola, Fin.) 



2 (1). Fore tarsi all or mostly yellow. 



