DURHAM DIPTERA. 345 



XLVII. 587. 



4 (3). Fore femora all black. ( 2 55°« atrata, F.) 



5 (2). Mid and hind legs mostly or entirely yellow. 



6 (7) (8). Mid and hind legs with the tip half of the femora 



and the last two tarsal joints black ; vertex broadly 

 black. ( 2 55 T - varipes, Mg.) 



7 (6) (8). Mid femora faintly, hind femora distinctly darkened 



at the tip ; head all orange, except the ocellar spot. 



(2552. affints, Mg.) 



8 (6) (7). Fore legs all black except the coxae ; mid and hind 



legs entirely orange ; vertex narrowly black. 



(2553. nigrimana, Mg.) 



9 (1). Face black. 



10 (13). Antennae orange. 



11 (12). Mid and hind femora orange with a broad black 



band. (2554. nigriceps, Mg.) 



12 (11). Mid and hind femora all orange; fore tibiae and first 



three tarsal joints rather dilate, the last two thin. 



(2555. latipes, Mg.) 



13 (10). Antennae black. (2556. nigricornis, Mg.) 



Family XLVIII.— GEOMYZID^E. 



TABLE OP GENERA. 



1 (4). Arista bare or scarcely pubescent. 



2 (3). Third antennal joint round, disc-like ; wings always 



unspotted. Anthomyza, Fin. (589) 



3 (2). Third antennal joint elliptical ; wings mostly spotted. 



Geomyza, Fin., part (590) 



4 (1). Arista plumose, or at least distinctly pubescent. 



5 (6). V.4 4 at least twice as long as V.4 3 ; X.4. on the 



middle of the wing and always far beyond the end 

 of V.I. Geomyza, Fin., part (590) 



6 (5). V.4 4 about equal to V.4 3 ; X.4. far before the middle 



of the wing, and about in a line with the end 

 of V.I. Diastata, Mg. (591) 



