362 DURHAM DIPTERA 



LI. 631. 



631. Meromyza, Mg. 

 Life history unknown. 



1 (2). Abdomen with a black centre stripe. 



2688. Meromyza pratorum, Mg. 

 Hesleden, 1 $, Aug. 5, 1902. 



2 (1). Abdomen with three rows of black dots. 



3 (4) (7). Palpi all yellow ; hind femora with two small black 



dots at the tip. (2690. variegata, Mg.) 



4 (3) (7). Palpi with black tips. 



5 (6). Hind femora with two small black dots at the tip. 



2692. Meromyza lata, Mcq. 

 Hesleden, 3 $ and 6 ?, July-August, 1899-1900. 



6 (5). Hind femora not spotted at the tip. 



(2689. saltatrix, L.) 



7 (3) (4). Abdomen shining black with slight yellow in- 



cisions ; palpi with black tips ; hind femora not 

 spotted. (2691. nigriventris, Mcq.) 



632. Centor, Lw. 



1 (2). Arista pale; mid tibiae of the male long haired. 



cereris, Fin. (2693) 



2 (1). Arista dark. 



3 (4). Mid tibiae of the male long haired. 



(2694. myopinus, Lw.) 



4 (3). Mid tibiae of the male short haired. 



(2695. nudipes, Lw.) 



633. Anthracophaga, Lw. 



1 (2). Hind margins of abdominal segments prominently 



yellow. (2696. strigtda, F.) 



2 (1). Abdominal segments without yellow hind margins. 



3 (4). Vertical triangle and antennae entirely black. 



(2697. frontosa, Mg.) 



4 (3). Vertical triangle and antennae not entirely black. 



(lougicomis, Ztt.) 



