Dolichopodidae. 97 



the raiddle tibiæ, but not rarely the male has only one; the female 

 on the contrary seems always to have tvvo, and sometimes even three. 



D. discifer is not common in Denmark, but has however been 

 taken in many locahties; Dyrehaven, Bøllemosen, Geel Skov, Ruder- 

 hegn, Nordskoven at Jægerspris, Sorø; on Langeland at Lohals; in 

 Jutland at Horsens, Silkeborg, Laven near Silkeborg and Frijsenborg; 

 and on Bornholm at Almindingen. My dates are ^^k — ^^/s. Stæger l.c. 

 records it from the last part of May. It occurs on bushes and in low 

 herbage in woods, and near water and on water piants. 



Geographichal distribution: — Northern and middle Europe down 

 into France; tovi^ards the north to southern Sweden, and in Finland 

 and Siberia; it occurs also in North America. 



18. D. confusus Zett. 



1843. Zett. Dipt. Scand. II, 535, 29, et 1849. VIII, 3080,29. — 1862. 

 Schin. F. A. I, 216. — 1903. Kat. palåarkt. Dipt. II, 297. ~ Dolichopus 

 patellatus Stann. (nec Fall.), 1831, 59, 11. — Dolichopus plumipes Meig. 

 (nec Scop.) 1824. Syst. Beschr. IV, 87, 23. 



Male. Vertex and frons green or bluish green. Epistoma some- 

 what narrow, narrowed downwards, whitish grey. Palpi yellow. 

 Occiput green, greyish pruinose; postocular bristles yellow below, 

 black above. Antennæ not quite as long as the head, the third joint 

 about as long ae broad, or slightly longer; it is somewhat ovate, the 

 point turned a little upwards, the upper edge slightly concave; the 

 antennæ are black, inconspicuously yellow below the apex of the basal 

 joint. Thorax green or golden green, often a median and two side- 

 stripes are golden, and sometimes thorax is bluish green ; it is slightly 

 pruinose, shining; scutellum fmely yellow pubescent; postscutellum 

 greyish pruinose. Pleura greenish, grey pruinose ; propleura with pale 

 yellow hairs and a black prothoracic bristle. Abdomen green or golden 

 green, more or less with copper-coloured reflexes, and coppery towards 

 the end; it is slightly whitish pruinose downwards, and the segments 

 have very narrow, darkened hind margins; it is clothed with short, 

 black hairs, the hindmarginal bristles short, somewhat longer on the 

 first segment. Venter greyish with a little longish, pale hairs at the 

 base and darker hairs towards the end. Hypopygium black, slightly 

 æneous, and greyish pruinose on the anterior part and above; 

 the eighth segment with black hairs; there are slightly projecting 

 posterior ventral lobes, with a small point at the end; the inner 

 lamellæ short, curved downwards, the median pointed, the lateral 

 dilated and with a hyaline dilatation at the apex; the outer lamellæ 

 somewhat oval, whitish with a somewhat broad, blackish brown margin 



7 



