338 DURHAM DIPTERA. 



XLIII. 571. 



8 (7). Wings with brown marks on the fore margin, the tip, 



and the middle. 



9 (10). Dorsum shining orange with black stripes. 



(2476. ambusta, Mg.) 



10 (9). Dorsum orange, unstriped. 



11 (12). Arista bare, the spot at the end of V.l.b. not reaching 



V.2. ; last tarsal joints dark. 



2477. Palloptera trimacula, Mg. 

 Bishop Auckland, 1 $ and 1 ?, Evenwood, 1 $, 

 Harperley, 1 ?, June-July, 1896-1901. 



12 (11). Arista distinctly pubescent or short haired, the spot 



at the end of V.l.b. large and extending nearly to 

 V.3.; tarsal joints all yellow. (2478. arcuata, Fin.) 



Family XLIV.— SAPROMYZIDiE. 



TABLE OF GENERA. 



1 (2). Wings with long stripes over V.4. and V.5. ; wings 



lying roof-like over the abdomen. 



573. Peplomyza, Hal. (2481. wiedemanni, Lw.) 



2 (1). Wings spotted or unspotted, but not striped, lying flat 



on the abdomen, not roof-like. 



3 (4). Shining orange, or matt-dark or black species, not 



metallic ; third antennal joint moderately long or 

 short ; arista bare, pubescent, or plumed. 



Sapromyza, Fin. (574) 



4 (3). Shining metallic black or black-green species, whose 



third antennal joint is usually much lengthened, 

 and the arista nearly bare. Lauxania, Ltr. (575) 



TABLES OP SPECIES. 



574. Sapromyza, Fin. 



1 (14). Arista distinctly and long plumed, or at least short 



haired. 



2 (9). Dorsum black or grey ; arista long haired. 



3 (4). Abdomen brownish black. (2482. longipennis, F.) 



4 (3). Abdomen orange or red brown. 



