Dolichopodidae. 35 



Length 2,7 — 3,8 mm. 



This species is in the male easily distinguisiied from the preceding 

 by the simple tarsi; in the female the grey middle coxæ and the 

 green frons are good characters, as also the four bristles below the 

 front femora: fmally the species is much smaller and less pruinose, 



S. longulns is much less common in Denmark than platt/pterus 

 and Wiedemanni; Lersøen, Charlottenlund, Ordrup Mose, Dyrehaven, 

 Tisvilde; on Langeland at Lohals, and on Bornholm at Allinge. My 

 dates are ^/t — ^'Vt. It occurs in low herbage and on leaves on humid 

 and shaded piaces. 



Geographical distribution : — Northern and middle Europe down 

 into France (Gorsica) ; towards the north to middle Sweden. 



5. S. contristans Wied. 



1817. Wied. Zool. Mag. I, 72, 19 (Dolichopus). — 1843, Zett. Dipt. 

 Scand. II, 627,3, et 1849. VIII, 3106,3 (Psilopus). — 1857. Loew, Neue 

 Beitr. V, 5, 9 (Psilopus). — 1862. Schin. F. A. I, 181 (Psilopus). — 

 1871. Loew, Beschr. eur. Dipt. II, 306, nota (Psilopus). — 1903. Kat. 

 palaarkt. Dipt. II, 290. — Psilopus regalis Meig. 1824. Syst. Beschr. IV, 35. 



Male. Head broader than high; vertex and frons greyish white, 

 bristles black. Epistoma broad, white. Palpi pale y el low, with pale 

 hairs and a small, black bristle. Occiput grey; postocular hairs white, 

 and the lower part of occiput covered with white hairs; the upper- 

 most postocular hairs black. Antennæ with the basal joint yellow, 

 the third joint and the arista black, the second joint more or less 

 brown or black. Thorax grey, a little greenish, but only slightly 

 metallic, dull, whitish about the humeri; the bristles black; the acro- 

 stichal bristles rather large; there are three supraalar bristles, the 

 hindmost longest. Scutellum with two black bristles, and on each 

 side a small hair. Pleura whitish grey. Abdomen greyish green, 

 somewhat pruinose, with broad, dark brown transverse bands at the 

 anterior margin of the segments; the bands do not reach the side 

 margins, and on the second segment there is only a middle spot. 

 Abdomen is clothed with black hairs along the dorsum, yellow hairs 

 at the sides and on the first segment; at the hind margins there are 

 rather small bristles, longest at the sides, the first segment has long, 

 black marginal bristles. Venter greyish, with pale hairs. Hypopygium 

 rather small, it is constructed quite as in Wiedemanni, but the append- 

 ages are darker to black. Legs yellow, the posterior coxæ grey, a 

 little yellowish at the apex, and the hind coxæ on the posterior side; 

 all tarsi brownish black, the metatarsi except the apex lighter. Front 



3* 



