Dolichopodidae. 237 



metatarsi with a row of bristles below, the bristles scarcely as long 

 as in diaphana. Wings slightly tinged; veins brownish black, the 

 discai bend large, nearer to the cross-vein than to the apex, Squamulæ 

 dirtily whitish, with a broad, blackish margin and a black fringe. 

 Balteres yellow. 



Female unknown, 



Length fully 7 mm. 



A. Loewii is very rare in Denmark, we have only one specimen, 

 taken by Stægor in earlier time (1839) on Amager at the shore in 

 August. The species was founded by Kowarz in 1878, but it was 

 already known to Stæger as a new species in 1839, and mentioned as 

 A. albiceps n. sp. in a letter to Zetterstedt; Kowarz' name will however 

 have to be used as albiceps must be considered as a nomen nudum. 



Geographical distribution : — The species is only known from 

 Denmark and Bohemia. 



3. A. magnicornis Zett. 



1838. Zett. Ins. Lapp. 712, 19, et 1843. Dipt. Scand. II. 593, 81, et 

 1849. VIII, 3091, 81 (Dolichopus). — 1878. Kow. Verhandl. zool. bot. 

 Gesell. Wien, XXVIII, 441, 1, Taf. V, Fig. 15—18. — 1903. Kat. palåarkt. 

 Dipt. II, 325. — Argyra aristata Gerst. 1864. Stett. Ent. Zeitg. XXV, 31,4. 



Male. Head relatively somewhat small, and a little arched behind. 

 Vertex and frons greyish white ; eyes with whitish hairs. Epistoma some- 

 what narrow, white. Palpi small, black. Occiput grey pruinose; post- 

 ocular bristles black above, yellowish below. Antennæ black, long, 

 almost twice as long as the head, third joint about as long as the 

 two basal joints; arista short, only slightly longer than the third joint. 

 Thorax metallic green, scutellum more bluish; the thoracic disc with 

 a pair of faint, dark grey stripes in the middle; it is brownish grey 

 pruinose, not nmch shining, about the humeri more whitish grey 

 pruinose; the scutellum has shortish hairs, but the thoracic disc not, 

 except the usual short hairs in front. Pleura grey, prothoracic 

 bristles strong, black. Abdomen dark metallic green, the second and 

 third segments with yellow, translucent spots at the sides (sometirnes 

 only present on the second segment) ; abdomen clothed with black, not 

 short hairs, and it has hindmarginal bristles, which are long on the 

 first segment; eighth segment with some long bristles at the end. 

 Venter greenish grey, yellow on the basal part, with blackish hairs. 

 Legs yellow, coxæ grey, front coxæ somewhat yellowish at the apex 

 and behind; hind femora black above at the apex, and hind tibiæ 

 black at the apex; front tarsi blackish brown towards the end, the 

 middle tarsi from the apex of the first joint, and the hind tarsi quite 



