230 DURHAM DIPTERA. 



XXXI. 383. 



383. Servillia, Dsv. 



9 (10). Abdomen black with orange sides. (1796. lurida, F.) 

 10 (9). Abdomen black without orange sides. 



(1797. ursina, Mg.) 



384. Plagia, Mg. 



1 (4). Lower fronto-orbital bristles extending over the cheeks 



to about their middle. 



2 (3). V.I. and V.3. both bearing bristles; palpi black with 



yellow tips. 



1798. Plagia ruralis, Fin. 

 Hesleden, 1 $ and 1 ?, August, 1900. 



3 (2). V.I. bare; V.3. with bristles ; palpi yellow. 



(1799. curvinervis, Ztt.) 



4 (1). Lower fronto-orbital bristles extending over the 



cheeks almost to the mouth ; palpi black. 



(1800. trefiida, Mg.) 



Sub-Family Thryptoceriisle. 

 386. Phorich^ta, Rnd. 



1 (4). Palpi yellow or orange. 



2 (3). Third antennal joint broad and plump, entirely dark. 



(1802. lugens, Mg.) 



3 (2). Third antennal joint narrow, and pale at the base. 



(1803. carbonaria, Pz.) 



4 (1). Palpi black. (1804. tricincta, Rnd.) 



390. Roeselia, Dsv. 



1 (2). V.4. incomplete, broken off at the bend ; third 



antennal joint black in both sexes ; base of the 

 wing yellow. (1809. antigua, Mg.) 



2 (1). V.4. complete; antennse all yellow in the female; 



wings not yellow at the base. 



(1809^. pallipes. Fin.) 





