Dolichopodidae. 321 



small bristle. Wings slightly yellowish or brownish tinged; veins 

 blackish, the last part of the discai vein straight, very slightly con- 

 verging towards the cubital vein; the last part of the postical vein a 

 little longer than the cross-vein. Squamulæ yellow, with a slight 

 brownish margin and a pale yellow fringe. Halteres yellow. 



Female. Epistoma very shghtly broader than in the male, for 

 the rest quite similar to it. 



Length 2 — 2,2 mm. 



M. micaceus is rare in Denmark ; Charlottenlund (Stæger) ; in Jut- 

 land at Hald near Viborg, Sæby, Frederikshavn and Skagen, and on 

 Bornholm at Rønne (H.J.Hansen). The dates are in" July and August. 



Geographical distribution: — Europe down into Spain and Sicily; 

 towards the north to northern Sweden. 



4. M. muralis Meig. 



1824. Meig. Syst. Beschr. IV, 62, 5. — 1843. Zett. Dipt. Scand. Il, 

 455, 16, p. p. var. c, et 1859. XIII, 5028, 16 {HydropJwrus). — \^11. 

 Kow. Verhandl. zool. bot. Gesell. Wien, XXVII, 50, 6, Taf. II, Fig. 21. — 

 1903. Kat. palåarkt. Dipt. II, 339. — Hydrophorus jaculus Fall. 1823. Dipt. 

 Suec. Dol. 5, 7, p. p. — Medeterus melanopleurus Loew, 1857. Neue 

 Beitr. V, 52. 



Male. Vertex and frons greyish pruinose. Epistoma blackish or 

 brownish black, below black and somewhat shining. Palpi black. 

 Occiput greenish or bluish, greyish pruinose; postocular bristles black, 

 or somewhat brownish reflecting. Antennæ black, third joint short, 

 roundish; arista almost apical, long. Thorax green or bluish green, 

 somewhat whitish grey pruinose; acrostichal bristles very short; the 

 dorsocentral rows consisting of about three small bristles in front, 

 then a somewhat longer, and two long behind. Scutellum with four 

 bristles. Pleura bluish or almost purplish, a little brown pruinose; 

 propleura with two to three dark brown prothoracic bristles. Abdomen 

 dark metallic green or bluish green, very slightly pruinose ; it is clothed 

 with short, dark brown hairs, and has longer bristles at the hind 

 margin of the first segment on the sides. Hypopygium of medium 

 size; the ventral lobes long, yellow, black at the base; they are 

 curved rectangularly downwards at the apex, (the shape figured by 

 Kowarz 1. c. Fig. 21 I could not see distinctly on my few specimens); 

 the outer lamellæ triangular, yellow. Legs with the coxæ blackish, 

 greyish pruinose; the legs otherwise either quite black, or the tibiæ 

 and tarsi brown, the hind metatarsus more or less yellow, or the 

 legs are paler with the apex of the femora, the tibiæ, especially on 

 the apical part, and the tarsi except the last joint yellowish; hind 



^21 



