Dolichopodidae. 209 



in rather great numbers; they may be foiind both on shady and on 

 more sunny piaces. 



Of the genus about 22 species are l<:nown from the palæarctic 

 region, besides some doubtful ; 9 have hitherto been found in Denmark. 



Tahle of Species. 

 Males. 



1 . Femora mainly yellow 2. 



— Femora mainly black 3. 



2. Femora quite yellow; front coxæ black-haired X.neglectus. 



— Hind femora black at apex; front coxæ pale-haired . . . '2,. cilipes. 



3. Hind trochanters, and generally also base of femora 

 yellow; anterior tibiæ yellow 4. 



— Hind trochanters black or brownish, hind femora not 

 yellow at base; anterior tibiæ black, brown or yellow. . 5. 



4. Third antennal joint not large; hind tibiæ distinctly 



ciliated with somewhat long cilia 3. femoratus. 



— Third antennal joint large ; hind tibiæ slightly ciliated 4. pulchellus. 



5. Epistoma somewhat broad ; acrostichal hairs very small ; 



legs black, front coxæ pale-haired; colour cyaneous . . 5. laesus. 



— Epistoma quite narrow or eyes touching; acrostichal 

 hairs distinct 6. 



6. Front coxæ more or less pale; bristles on posterior 



tibiæ small ; legs black 6. cupreus. 



— Front coxæ not pale; bristles on posterior tibiæ not 

 specially small 7. 



7. Front tibiæ distinctly ciliated; legs black, or only an- 

 terior tibiæ brownish 7. hlepharosceles. 



— Front tibiæ not ciliated; anterior tibiæ yellow 8. 



8. Antennæ black; hind tibiæ blackish 8. gramineus. 



— Antennæ more or less reddish at base ; hind tibiæ yel- 



lowish 9. microcerus. 



F e ma les. 



1. Femora pale, only hind femora blackish at tip; front 



coxæ pale-haired 2. cilipes. 



— Femora always more black 2. 



2. Hind trochanters and generally base of femora yellow; 

 tibiæ yellow 3. 



— Hind trochanters black or brownish, hind femora not 

 yellow at base 5. 



3. Third antennal joint large; hind tibiæ yellow, at most 



brownish at the tip 4. pulchellus. 



— Third antennal joint not specially large 4. 



4. Hind tibiæ (generally) quite yellow 1. neglectus. 



— Hind tibiæ black or brown at apex 3. femoratus. 



5. Front coxæ distinctly white-haired ; acrostichal hairs very 



small 5. laesus. 



14 



