Dolichopodidae. 349 



grey pruinose; propleura with pale hairs and one black prothoracic 

 bristle. Abdomen short, obliquely trimcate behind, the fourth ventral 

 segment arched downwards; it is green or more or less æneous, grey 

 pruinose at tiie sides, and clothed with short hairs, which are black 

 above, pale and a little longer at the sides in front. Venter grey, 

 with pale hairs. Hypopygium almost hidden, the outer lamellæ pro- 

 truding downwards, not short, somewhat lancet-like, brownish. Legs 

 green, coxæ grey, the front coxæ æneous anteriorly and yellowish 

 pruinose; front femora somewhat, posterior femora very slightly 

 pruinose; tarsi blackish; the legs have short, chiefly blackish hairs, 

 and a little pale pubescence towards the end of the tiblæ, especially the 

 hind tiblæ, and below the tarsi; the coxæ are pale-haired; the front 

 femora have irregular rows of very short spines below and partly on 

 the posterior side; only a row on the basal part with the spines a 

 little longer; besides they have on the antero-ventral side dense, 

 somewhat curled, brown hairs; the front tibiæ have on the antero- 

 ventral side a dense row of exceedingly short, scarcely perceptible 

 spines, and on the postero-ventral side somewhat dense hairs; the 

 posterior femora and tibiæ have various, scattered bristles. Wings a 

 little brownish tinged; veins black; there is a brown spot about on 

 the middle of the discai vein, and one on the upper part of the 

 posterior cross-vein ; the last part of the discai vein slightly undulated, 

 a little converging towards the cubital vein. Squamulæ yellow or 

 reddish yellow, with a whitish fringe. Halteres yellow, the knob 

 blackish or brown above, but yellow along the inner margin. 



Female. Epistoma as in the male, a little broader above, with 

 more parallel horders. Front femora less thickened than in the male, 

 without spines; front tibiæ without the row of short spines, but with 

 a few, somewhat strong, short bristles. Wings slightly more brownish 

 on the anterior half. 



Length 4,3 — 5 mm. 



H. bipunctatiis is rare in Denmark, and has chiefly been taken 

 in earlier time; Dyrehaven, Hillerød, Roskilde; Mr. Becker has kindly 

 communicated to me that he has taken it on Bornholm. My dates 

 are in July ; Drewsen has recorded it from Bøllemosen at the end of 

 November. It is recorded to occur at slowly flowing slreamlets with 

 muddy horders. 



Geographical distribution: — Northern and middle Europe down 

 into France; towards the north to middle Sweden. 



6. H. borealis Loew. 

 1857. Loew, Neue Beitr. V, 23. — 1903. Kat. palåarkt. Dipt. II, 342. 

 — Htjdrophorus hinotatus 1849. Zett. (nec Fall.) Dipt. Scand. VIII, 3048, 



