Uolichopodidae. 275 



ditches; Schiner notes that he found them especially on Veronica 

 Beccabunga and Mentha silvestris; several species prefer salt marshes. 

 Of the genus 20 species are known from the palæarctic region; 

 5 have hitherto been found in Denmark. 



Tahle of Species. 

 Males. 



1 . Middle tarsi with dilated joints ; arista subapical 1 . tarsatus. 



— Middle tarsi normal; arista apical 2. 



2. Anterior femora without bristles below at the base; hind 

 metatarsi with a curved spine, or with two erect spines; 

 squamular fringe yellow 3. 



— Anterior femora with one or several bristles below near the 

 base ; hind metatarsus without spines, at most with a pair 



of bristles ; squamular fringe black or dark brown 4. 



3. Hind metatarsus with a curved, bifid thorn beneath near 



base 2. pallipes. 



— Hind metatarsus with two straight spines beneath near base 3, punctatus. 



4. Anterior femora with one bristle below near base; hind 

 tarsi with short bristles on the first joint and a long bristle 

 on the second joint below ; arista very much shorter than 



the third antennal joint 4. rufipes. 



— Front femora with four, middle femora with three bristles 

 below near base; hind tarsi without bristles below; arista 



about as long as the antennæ 5. pumilus. 



Fe males. 



1. Goxæ and metaepimera yellow 2. 



— Posterior coxæ and metaepimera grey 3. 



2. Arista subapical; abdomen only yellow at the sides 1. tarsatus. 



— Arista apical; abdomen more yellow "^.punctatus. 



3. Squamulæ with a yellow fringe; abdomen somewhat pale- 



haired at the sides 2. pallipes. 



— Squamulæ with a black or dark brown fringe , abdomen not 

 pale-haired at the sides 4. 



4. Front coxæ and femora yellow 4. rufipes. 



— Front coxæ and femora more or less grey at the base ... 5. pumilus. 



1. S. tarsatus Fall. 



1823. Fall. Dipt. Suec. Dol. 7, 4 (Hydrochus). — 1843. Zett. Dipt. Scand. 

 Il, 464, nota, et 608, 96, et 1849. VIII, 3096, 96, et 1859. XIII, 5068, 96 

 (Dolichopus). — 1903. Kat. palåarkt. Dipt. II, 333. — Dolichopus gratiosus 

 Meig. 1824. Syst. Beschr. IV, 100, 47, ?. — 1843. Zett. Dipt. Scand. II, 

 586,75,?. —Dolichopus obscurellus (nec Fall.) 1838. Zett. Ins. Lapp. 700, 

 6, p, p. ? — Porphyrops palmipes Meig. 1824 Syst. Beschr. IV, 55,22, ^. 



— Porphyrops vittatus Macq. 1834. Suit. å Buff. I, 144, 10, J*. — 1838. 

 Meig. Syst. Beschr. VII, 152, 31, J*. 



18* 



