296 Ortbonhapha brachycera. 



twice as long as the antennæ. The legs as in the palest varieties of 

 the male, hind tibiæ yellow, hind metatarsi often pale at the base; 

 middle coxæ without apical spine; middle tibiæ with one or tvvo 

 small ventral bristles. 



Length 2,6 — 3 mm. 



X. caliginosmn is not rare in Denmark, though it can scarcely 

 be termed eommon; at Lersøen, Ordrup Mose, Ermelund Lyngby 

 Mose, Faxe Ladeplads, and in Jutland in Grejsdalen at Vejle. My 

 dates are ^/r; to the first part of August. It occurs in low herbage 

 on humid piaces, and at the horders of water: I have taken it to- 

 gether with monotrichum on leaves of Alnus and Rubus. In an old 

 manuscript from Stæger I find the note, that the species was eommon 

 on hedges al the lake Lersøen in two generations, one in June and 

 a second in August. 



Geographical distribution: — Europe down into Spain and Italy: 

 towards the north to northern Sweden, and in Finland. 



5. X. appendiculatum Zett. 



1849. Zett. Dipt. Scand. VIII, 3058, 3—4, et 1859. XIII, 5029, 3—4 

 {Rhaphium). — 1850. Loew, Stett. ent. Zeitg. XI, 133, 31, Tab. I, Fig. 

 38—39, et 1857. Neue Beitr. V, 31 (Rhaphiinn). — 1862. Schin. F. A. I, 

 195 (Rhaphium). — 1903. Kat. palåarkt. Dipt. II, 334. — Rhaphium macro- 

 rerum 1843. Zett. Dipt. Scand. II, 460, 3 p.p. 



Male. Vertex and frons cyaneous blue. Epistoma narrov^^, silvery 

 v^hite. Palpi small, greyish. Occiput green, greyish pruinose; post- 

 ocular hairs black above, vvhite below. Antennæ black, very long, 

 the third joint strongly elongated, band-shaped, the very short arista 

 about one eighth part of it in length. Thorax dark green, somewhat 

 pruinose, not much shining; scutellum brighter. Pleura green, greyish 

 pruinose; propleural hairs pale. Abdomen green, more or less æneous 

 or coppery, especially above and towards the apex; it is clothed with 

 short, black hairs, a little longer and pale at the sides in front; there 

 are hindmarginal bristles, long on the first segment; the eighth seg- 

 ment with short hairs, slightly longer tlian in caliginosiim. Venter 

 greenish, grey pruinose, with yellow hairs. Hypopygium blackish; the 

 ventral lobes black, flat, a little dilated towards the end, and curved 

 a little downwards; they are densely haired at the end, and have 

 above a long, thick, yellow bristle (closely gathered hairs), which at the 

 end breaks up into downwards curved hairs; the outer lamellæ are 

 long, band-shaped, slightly dilated towards the apex, brown or yel- 

 lowish brown, and hairy at the margin. Legs yellow, posterior coxæ 

 grey with the apical part yellow; hind femora more or less darkened 



