Dolichopodidae. 33 



the hind metatarsus about as long as the second joint. The upper 

 branch of the discai vein more rectangularly curved, 



Length 4 — 6 mm; the male is longest. 



This species externally resembles j)latypterus somewhat, but they 

 are easily distinguished; the males are at once recognised by the 

 wings, the legs and the hypopygium, and also the spinulation of the 

 legs is quite different; the females are more like each other, especially 

 as the legs are spinulated in about the same way, but they are 

 easily distinguished by the narrow epistoma and the longer hind 

 metatarsus in plati/pterus, characters which are present in both sexes. 



S. Wiedemanni is common with us; Copenhagen, Vester Fælled, 

 Charlottenlund, Dyrehaven, Fure Sø, Hillerød; Tisvilde and Rørvig; 

 on Langeland at Lohals; on Funen at Odense and Faaborg; in Jut- 

 land at Silkeborg, Ry, Laven and Funder near Silkeborg, Hald near 

 Viborg, Aalborg and Frederikshavn; fmally on Bornholm at Hasle 

 and Almindingen. My dates are ^^l& — Vs. It occurs in low herbage 

 and on bushes, and it seems to be most common near the coast. 



Geographical distribution: — Europe down into Spain; towards 

 the north to middle Sweden ; and in Finland. 



4. S. longulus Fall. 



1823. Fall. Dipt. Suec. Dol. 24, 4 (Leptopus). — 1830. Meig. Syst. 

 Beschr. VI, 361, 10 (Psilopus). — 1843. Zetl. Dipt. Scand. II, 629, 6 et 

 1849. VIII, 3107, 6 et 1859. XIII, 5072, 6 (Psilopus). — 1903. Kat. 

 palåarkt. Dipt. II, 291. — Psilopus lugens Meig. 1824. Syst. Beschr. IV, 

 38, 6. — 1843. Zett. Dipt. Scand. II, 628, 5 et 1849. VIII, 3106, 5. — 

 1862. Schin. F. A. I, 182. — Psilopus obscurus Meig. 1824. Syst. Beschr. 

 IV, 39, 7. 



Male. Head broader than high; vertex and frons green, shining, 

 slightly dusted; bristles black. Epistoma broad, green, greyish yellow 

 dusted. Palpi yellowish, with pale hairs and one dark bristle. Occiput 

 greyish green; the upper postocular hairs black, the others together 

 with the hairs on the lower part of occiput whitish. Antennæ with 

 the basal joints yellow or brownish, darkened above and at the apex 

 of the second joint; the third joint and the arista black. Thorax 

 green, shghtly dusted, and with indications of two more dusted stripes; 

 the bristles black, the acrostichal bristles small; there are three supra- 

 alar bristles. Scutellum with two black bristles and on each side a 

 small hair. Pleura grey, slightly greenish. Abdomen green, shining, 

 darker incisures very narrow and inconspicuous ; it is clothed with 

 hairs, which are mainly black, but yellow at the sides and partly 

 anteriorly; Ihe long hairs on the th-st segment black; at the hind 



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