Dolichopodidae. 393 



Wings slightly yellowish tinged, most towards the anterior margin; 

 veins brown ; the discai vein a little curved towards ttie apex, and a 

 little converging towards the cubital vein. Squamulæ and the fringes 

 yellow. Balteres yellow. 



Female. Epistoma a little broader than in the male. Pleura 

 often more yellow, sometimes also the præsutural depression and the 

 humeri yellow. Abdomen often more yellow. Femora not with longer 

 hairs below, and front tibiæ and tarsi not ciliated. 



Length 2,6 — 3 mm. 



X.ornatus is common in Denmark; Charlottenlund, Ordrup Mose, 

 Ermelund, Ørholm, Tyvekrog, Rørvig, Tisvilde, Faxe Ladeplads; on 

 Langeland at Lohals; on Funen at Odense and Veflinge; in Jutland 

 at Hald near Viborg and at Frederikshavn, and on Bornholm at Rønne, 

 Hasle and Rø. My dates are '^/e — ^^/t. It occurs in grass and low 

 herbage and on bushes in shaded piaces in woods, and also outside. 



Geographical distribution : — Europe down into Italy, and further 

 on the Ganary Islands; towards the north to middle Sweden. 



2. X. tenellus Wied. 



1817. Wied. Zool. Mag. I, 73, 20 {DoUchopus). - 1824. Meig. Syst. 

 Beschr. IV, 69, 21 {Medeterm). — 1862. Schin. F. A. I, 184. — 1903. 

 Kat. palåarkt. Dipt. II, 350. — DoUchopus flav ellus Zett. 1843. Dipt.Scand.il, 

 618, 105. 



Male. Vertex and frons yellowish grey or grey pruinose. Epistoma 

 white. Palpi yellow. Occiput greenish, greyish pruinose; postocular 

 bristles yellow. The vertical bristles yellow. Antennæ with the two 

 basal joints yellow, the third brown. Thorax yellow, greyish pruinose, 

 the flat area in front of scutellum green or æneous green, this colour 

 sometimes extended beyond the area; the bristles dark yellow or 

 ferruginous. Scutellum and postscutellum yellow. Pleura yellow, slightly 

 greyish pruinose ; at the upper corner of the metapleura and at the 

 sides of postscutellum a small, blackish spot; propleura with a whitish 

 prothoracic bristle. Abdomen yellow, more or less darkened or green 

 above on one or more of the middle segments; it is clothed with 

 brown hairs, and has distinct hindmarginal bristles, long on the first 

 segment. Venter yellow, with pale hairs. Hypopygium yellow. Legs 

 yellow, tarsi slightly darkened towards the end, the last joint blackish, 

 The legs have short, brown hairs, coxæ pale-haired; front coxæ with 

 bristly hairs at the apex, posterior coxæ each with a yellow bristle; 

 the legs for the rest short-haired, a little longer hairs only below the 

 middle femora; front tibiæ and metatarsi not ciliated above; middle 

 tibiæ with two antero-dorsal and one postero-dorsal bristle; hind 



