Dolichopodidae. 359 



with a convexity near the cross-vein. Squamulæ wlth a well developed 

 angulary lobe with a long fringe ; also the inner part of the squamulæ 

 well developed, with long hairs. 



The developm ental stages are not known. 



The species of Campsicnermis are rather characteristic, especially 

 in the males with their peculiar legs, which reach, I think, their 

 climax in C. magius (non Danish); as Verrall notes (Entom. Month. 

 Mag. XVI, 1905, 194) Loew, when he had described this species, was 

 blamed by Gerståcker for making a new species from a fly whose 

 legs were deform ed by fungoid growth. The species occur in grass 

 and low herbage in fens, at the horders of lakes and streamlets, 

 especially where there is a rich vegetation of water piants; some 

 species occur on commons at the shore. They are strong robbers; I 

 have never myself seen them with prey, but Schiner states that they: 

 "verzehren, auf einem schwimmenden Blatte oder einem aus dem 

 Wasser vorragenden Steine sitzend, ihre Beute, die, soweit meine 

 Beobachtungen reichen, in winzigen Wasserthierchen besteht. Sie 

 konnen auch auf dem Wasser gehen." This latter faet I have not 

 observed. — The species are in the males easily recognisable on 

 account of the secondary sexual characters, but the females are very 

 difficult to determine. 



Of the genus about 27 species are known from the palæarctic 

 region; 7 have been found in Denmark. 



Tahle of Species. 

 Males. 



1. Legs more or less peculiarly formed or armed; antennæ 

 quite black 2. 



— Legs simple and unarmed; antennæ yellow at the base . . 7. jncticornis. 



2. Basal joint of middle tarsi much or somewhat shorter than 



the second joint 3. 



— Basal joint of middle tarsi much longer than the second 

 joint 5. 



3. Anterior femora with bristles below; middle tibiæ remark- 



ably dilated, curved and ciliated, and metatarsus with teeth \. scamhus. 



— Front femora without bristles below 4, 



4. Posterior femora with bristles below, middle tibiæ not curved 



in the middle 2. curvipes. 



— Only middle femora with bristles below; middle tibiæ curved 



in the middle 3. loripes. 



5. Middle femora and tibiæ with rather long bristles below ... 6. 



— Middle femora and tibiæ with only very short bristles below G. pumilio. 



6. Middle femora with moderately long, dense bristles below 

 in the whole length; hind tibiæ without long hairs and 



bristles 4. armatus. 



