DURHAM DIPTERA. 303 



XXXIV. 493. 



3 (1) (2). Abdomen, black, grey dusted. 



4 (7). Palpi black, or black at the tip. 



5 (6). Antennae black. (strigtfrons, Ztt., ?) 



6 (5). Antennas orange ; third joint darkened at the tip. 



{fulvtpes, Ztt., ?) 



7 (4). Palpi entirely yellow. 



8 (9) (12). Legs entirely black. {obscurella, Ztt.) 



9 (8) (12). Legs only partly biack. 



10(11). Legs orange, femora till near the tip black-brown; 

 bristles of the head and thorax black. 



(albipennis, Ztt.) 



11 (10). Legs shining orange, upper side of fore femora with 



a brown stripe, upper side of hind femora dark at 

 the base; bristles of the head and thorax pale 

 yellow. {lineata, Ztt.) 



12 (8) (9). Legs entirely yellow. 



13 (14). Face, cheeks, and jowls of the male partly black ; 



face of the female yellow ; palpi but little broadened ; 



• antennae black with the second joint grey dusted ; 



small sDecies. 



(2215. hcemorrhoidalis, Mg.—palZipes, Ztt.) 



14 (13). Face, cheeks, and jowls of both sexes yellowish ; 



palpi considerably broadened at the end; antennae 



entirely black ; large or middle sized species. 



{pallicauda, Ztt.) 



494. Trichopalpus, Rnd. 



1 (2). Antennae dark brown in both sexes ; third joint red at 



the base ; femora mostly dark grey. 



(2217. f rat emus, M g. ) 



2 (1). Antennae all orange in the male, partly brown in the 



female; femora all orange. (2218. punctipes, Mg.) 



495. Spathiophora, Rnd. 



1 (2). Femora nearly entirely grey, at most orange at the 



tip and base. (2219. hydromyzina, Fin.) 



2 (1). Femora orange with brown rings, whose breadth is 



one-third of the fore femora, one quarter of the 

 mid, and one half of the hind femora, so that at 

 least the tip half is orange. {/asctpes, Beck.) 



