174 DURHAM DIPTERA. 



XXVIII. 276. 



275. Orthoneura, Mcq. 

 Life history unknown. 



1 (2). Legs partly yellowish. (1442. elegans, Mg.) 



2 (1). Legs all black. 



3 (4). Third antennal joint nearly as broad as long. 



(1443. brevicornis, Lw.) 



4 (3). Third antennal joint nearly three times as long as 



broad. (i444- nobilis, Fin.) 



276. Liogaster, Rnd. 

 Larvae have been found in mud in a ditch. 



1 (2). Third antennal joint reddish orange beneath. 



(1445. splendida, Mg.) 



2 (1). Third antennal joint all black. 



1446. Liogaster metallina, F. 

 Bollihope, 1 $, June, 1901. 



277. Chrysogaster, Mg. 

 Larvae of one species have been found in mud. 



1 (2). Thorax bright brassy with two faint dark stripes in 



front. (i447' splendens, Mg.) 



2 (1). Thorax dark bronze, unstriped. 



3 (6). Antennae all blackish brown. Size 6^ mm. 



4 (5). Pubescence of thorax mostly pale brownish yellow. 



1448. Chrysogaster hirtella, Lw. 

 Harperley, 2 ?, 26th June; Bedburn, 3 ?, 7th July; 

 Hesleden, 1 ?, 5th August; all in 1902. 



5 (4). Pubescence of thorax all black. 



(1449. macquarti) Lw.) 



6 (3). Antennae with third joint reddish brown. Size 7 mm. 



7 (8). Coppery black species, wings not yellowish about the 



base. ( x 45 - viresce?is, Lw.) 



8 (7). Dull black species. 



9 (10). Wings yellowish about base. (145 1. chaybeata, Mg.) 



10 (9). Wings all blackish, even to the base. 



(1452. solstitiah's, Fin.) 



