Dolichopodidae. 323 



hairs on the anterior coxæ are brownish or blackish, the bristle on 

 the hind coxæ black; the hairs below the femora are somewhat long 

 and distinct, on the apical part bristly; they are brownish to blackish; 

 the hind femora have also some black, bristly hairs above at the 

 apex on the anterior side; middle tibiæ vvith a pair of bristles near 

 the base. Wings a little greyish tinged; veins blackish brown, paler 

 towards the base; the last part of the discai vein slightly curved, 

 strongly converging towards the cubital vein; last part of the postical 

 vein fully one and a half times as long as the cross-vein. Squamulæ 

 dirtily yellowish, with a blackish brown margin and a brown or dark 

 yellowish fringe. Halteres yellow. 



Length 2,7 to fully 3 mm. 



Of this species only the female has been described, and I also 

 possess only this sex, but Verrall says (Entom. Month. Mag. XVI, 1905, 

 189) that he has had numerous specimens of both sexes ; he however 

 does not describe the male. Kowarz suggests (1. c.) that apicalis may 

 be only a variety of tristis and means that only knowledge [of the 

 male will solve this question; Verrall however is seen to keep both 

 species. — Loew and Kowarz say that the coxæ are black-haired, 

 and that the stronger hairs below the posterior femora are black, but 

 I find them often brownish; I have examined one of Stæger's type- 

 specimens. As Zetterstedt says "Stæg. in litt." the name is originally 

 due to Stæger. 



Af. apicalis is rare in Denmark; Hellerup, Charlottenlund, Dyre- 

 haven, and in Jutland at Aalborg; only few specimens in all. My 

 dates are ^^h — ^^/s. I have taken it on tree-trunks; Stæger took it 

 in the same way in September and October. 



Geographical distribution:— Northern and middle Europe down 

 into Austria; towards the north to southern Sweden. 



6. M. pallipes Zett. 



1843. Zett. Dipt. Scand. II, 453, 13 (Hydrophorus). — 1877. Kow. 

 Verhandl. zool. bot. Gesell. Wien, XXVII, 55, 11, Taf. II, Fig. 17. - 1903. 

 Kat. palåarkt. Dipt. II, 339. — Hydrophorus jaculus 1838. Zett. Ins. Lapp. 

 702, 7, p. p. var. b, ^. — Medeterus muralis Loew (nec Meig.) 1857. Neue 

 Beitr. V, 55. — 1862. Schin. F. A. I, 238. 



Male. Vertex and frons whitish grey pruinose. Epistoma green, 

 a little pruinose above, darker and more shining below. Palpi black. 

 Occiput greenish, grey pruinose; postocular bristles white. Antennæ 

 black, third joint short; arista subapical, long. Thorax green or 

 æneous, sometimes somewhat bluish, distinctly greyish or yellowish 

 grey pruinose ; acrostichal bristles distinct ; the dorsocentral rows consist 



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