Dolichopodidae. 95 



D.claviger is common in Denmark; Charlottenlund, Ordrup Mose, 

 Ermelund, Dyrehaven, Hareskov, Ryget Skov at Farum Sø, Tisvilde, 

 Rørvig, Nordskoven at Jægerspris, Faxe Ladeplads, Nyraad near Vording- 

 borg ; on Langeland at Lohals ; on Funen at Strib ; in Jutland at Horsens 

 and at Hald near Viborg, and on Bornholm at Rønne. My dates are 

 2/fi_28/._ Stæger records it from May and June and again in August, 

 which would seem to indicate two broods; my dates do not confirm 

 this. The species occur in woods on bushes and in low herbage on 

 humid piaces and near water. The larva was found in Dyrehaven 

 in mole-casts on ""'U, they pupated on ^^l;^ and the imagines came on -••/s. 



Geographical distribution: — Northern and middle Europe down 

 into France; towards the north to southern Sweden, and in Finland. 



17. D. discifer Stann. 



1831. Stann. Isis 1831, 57, 10. — 1843. Zett. Dipt. Scand. II, 533, 

 28, et 1849. VIII, 3079,28, et 1859. XIII, 5048,28. — 1862. Schin. F. A. 

 I, 216. — 1903. Kat. palåarkt. Dipt. II, 297. — Bolichopus patellatus 

 Meig. (nec Fall.) 1824. Syst. Beschr. IV, 86, 22. - 1842. Stæg. Krøyer's 

 Tidsskr. IV, 21, 12. 



Male. Vertex and frons green. Epistoma narrow, white. Palpi 

 narrow, yellow. Occiput green, grey pruinose ; postocular bristles yellow, 

 black above. Antennæ a little elongated, fuUy as long as the head, 

 third joint elongated triangular ; they are black, the basal joint yellow 

 beneath. Thorax green or more golden green, slightly pruinose, shining ; 

 scutellum finely yellow pubescent; postscutellum grey pruinose. Pleura 

 green, grey pruinose; propleura with fine, pale hairs, and a black 

 prothoracic bristle. Abdomen green or somewhat golden green, some- 

 times with some bronze reflexes, finely whitish pruinose downwards; 

 the hind margin of the segments narrowly dark bronze-coloured.. It 

 is clothed with short, black hairs, and has hindmarginal bristles, which 

 are not long, except at the sides of the first segment. Venter greenish 

 grey, with very slight, pale hairs. Hypopygium large and long, black, 

 slightly greenish on the right side, grey pruinose; the eighth segment 

 with black hairs; the posterior ventral lobes narrow, projecting con- 

 siderably behind the end of the hypopygium, and with a little bristle at 

 the apex; the inner lamellæ curved downwards, the lateral dilated 

 and with a whitish dilatation at the apex, the median shorter and 

 lying close to the lateral; the outer lamellæ somewhat small, about 

 trapeze-shaped, whitish or yellowish white, with a narrow, blackish 

 margin along the ventral, apical and posterior half of the dorsal edge; 

 the end has long teeth, longest towards the dorsal corner, with curved, 

 black hairs; the ventral margin is serrated, with shorter hairs, and 



