Dolichopodidae. 257 



6. Front femora with a row of strong bristles below 6. consobrina. 



— Front femora without strong bristles below 7. 



7. Outer genital lamellæ broad, prolonged into a long process 



on the outer side 7. riparia. 



— Outer genital lamellæ narrow, variously curved, with a 



tuft of curled hairs at the ventral margin 8. penicillata. 



Females. 



1 . Thorax brightly shining, without indications of stripes ; hind 



femora with more than one preapical bristle ; largest species 3. elegantula. 



— Thorax less shining, more or less pruinose, generally with 



two stripes 2. 



2. Antennæ rather long, arista not or slightly longer than 



the antennæ 9. obscuripes. 



— Antennæ short, arista longer than the antennæ 3. 



3. Hind tibiæ slightly compressed and dilated, whitish yellow 



on basal half 2. fascipes. 



— Hind tibiæ not compressed or dilated, of a different colour . . 4. 



4. Epistoma brown ; anterior coxæ with no black hairs at 



apex 6. consobrina. 



— Epistoma grey or white 5. 



5. Epistoma silvery white; wings strongly brown 7. riparia. 



— Epistoma grey; wings less brown 6. 



6. Small species, not above 4 mm; femora mainly yellow; 



front coxæ with some black hairs at apex 4. nemorum. 



— Larger species, or if small the femora darker, and front 

 coxæ without black hairs at apex 7. 



7. Third antennal joint longer than broad, arista not twice 

 as long as the antennæ ; femora mainly yellow ; hind femora 

 with a preapical bristle ; front coxæ without black hairs 



at apex ; cubital vein distinctly recurved at the end 5. crassipes, 



— Third antennal joint not or almost not longer than broad; 

 femora darker; cubital vein not recurved at the end 8. 



8. Larger species; front coxæ with black bristles at the apex, 

 middle coxæ mainly black- or dark-haired; hind femora 



without preapical bristle 1 . spinicoxa. 



— Smaller species; anterior coxæ without black hairs at the 

 apex, middle coxæ pale-haired; hind femora with a pre- 

 apical bristle 8. penicillata. 



1. P. spinicoxa Loew. 



1850. Loew, Stett. ent. Zeitg. XI, 101,3, Tab. I, Fig. 13— 14, et 1857. 

 Neue Beitr. V, 30 (Rhaphium). — 1862. Schin. F. A. I, 196. — 1903. 

 Kat. palaarkt. Dipt. II, 330. — Rhaphium commune 1851. Walk. (nec Meig.) 

 Ins. Brit. I, 202,16. — Medeterus bilineatus Stæg. in litt. Zett. 1843. Dipt. 

 Scand. II, 469. 



Male. Vertex and frons dark green ; eyes dark brown-hairy. 

 Epistoma very narrow, black. Palpi black. Occipiit greenish, a little 



17 



