DURHAM DIPTERA. 35 1 



XLIX. 594. 



10 (7). Dorsum without distinct stripes or spots. 



11 (12). Antennae all orange or dirty yellow, with at most the 



tip of the third joint brown; face grey. 



(2582. rifiaria, Mg.) 



12 (11). Antennae with at least the first and second joints 



black. 



13 (16). Fore tibiae and fore tarsi dark brown; face yellow. 



14 (15). Third antennal joint only narrowly yellow at the base; 



mid tibiae not dark ringed. (2584. dorsata, Stnh.) 



15 (14). Third antennal joint orange with a dark brown spot 



in front ; mid and hind tibiae ringed. 



(2585. annuities, Stnh.) 



16 (13). Fore tibiae and fore tarsi brownish yellow. 



17 (18). Face ochre yellow. 



2583. Notifihila cinerea, Fin. 

 Hesleden, 3 ?, August, 1902. 



18 (17). Face white. (2578. stagnicola, Mcq.) 



596. Discomyza, Mg. 



1 (2). Black species; no dorso-central bristles in front; wings 



with the fore margin and X.5. clouded. 



(2587. incurva, Fin.) 



2 (1). Dark brown or bronze species; a pair of dorso-central 



bristles in front; fore margin of the wings and X.5. 

 not clouded. (2588. cimiciformis, Hal.) 



597. Psilopa, Fin. 

 Life history unknown. 



1 (6). Antennae yellow or partly yellow. 



2 (3). Legs wholly yellow; X.5 2 with a brown spot. 



(2589. leucostoma, Mg.) 



3 (2). Legs partly black ; wings unspotted. 



4 (5). Fore legs entirely black. ( 2 59°- nitidula, Fin.) 



5 (4). All tibiae and tarsi yellow. ( 2 59 J ' compta> Mg.) 



6 (1). Antennae black. ( 2 59 2 - nigritella, Stnh.) 



