Dolichopodidae. 381 



third and fourth segments. The abdominal segments have short hind- 

 marginal bristies, long on the first segment. Legs somewhat slender; 

 hind tarsi somewhat robust, shorter than tibiæ, the metatarsus about 

 as long as or slightly shorter than the second joint, without bristles 

 above. In the males of most species the third, or the third and fourth 

 joint on +he hind tarsi are bearded with hairs or bristles on the 

 posterior side, or otherwise armed. The posterior coxæ have each a 

 bristle, the posterior femora a preapical bristle; front tibiæ generally 

 v\'ith a very small postero-dorsal bristle, middle tibiæ with three 

 antero-dorsal and one postero-dorsal bristle, generally also a ventral 

 bristle; the posterior tibiæ have apical or preapical bristles. There 

 are two small claws, two pulvilli, and a narrow, linear empodium 

 with bristles below. Wings of usual shape, the mediastinal vein ter- 

 minates in the subcostal vein; the discai vein has a bend somewhat 

 after the posterior cross-vein, but its last part is parallel with the 

 cubital vein; the posterior cross-vein on or anterior to the middle of 

 the wing; the anal vein is weak, The axillary lobe very small in the 

 male, larger in the female. The discai bend lies on a distinct con- 

 vexity. The squamulæ have a small angulary lobe, with a long 

 fringe, the inner part of the squamulæ has short hairs. 



The developmental stages are not known. 



The species of Sympycnus occur in grass and low herbage, especi- 

 ally at the horders of water, in fens and on the whole in humid, 

 more or less .shady piaces. 



Of the genus about 13 species are known from the palæarctic 

 region; 2 have been found in Denmark. 



l'ahle of Species. 



1. Third antennal joint roundish, slightly pointed; front coxæ 

 yellow, only grey at the very base. In the male the third 

 and fourth joint of the hind tarsi short-bearded on the 

 posterior side 1 . aeneicoxa. 



— Third antennal joint triangular, distinctly pointed; front 

 coxæ grey, only yellow at the apex. In the male the third 

 and the basal part of the fourth joint of the hind tarsi 

 with longish bristles on the posterior side, and the third 

 with two or three long hairs at the base 2. annuUpes. 



1. S. aeneicoxa Meig. 



1824. Meig. Syst. Beschr. IV, 57, 26 (Porph/rops), et 1838. VII, 

 155 (Medeterus). — 1859. Loew, Neue Beitr. VI, 21, 1. — 1862. Schin. 

 F. A. I, 232. — 1889. Kow. Wien. Ent. Zeitg. VIII, 181,6. — 1903. Kat. 

 palåarkt. Dipt. II, 348. — Dolichopus brevicornis Zett. 1843. Dipt. Scand. 



