Dolichopodidae. 245 



are two or three pairs; in the male of argijria I found two to three 

 pairs, in tiie female two pairs ; in argentma I have. always found one 

 pair in both sexes. 



7. A. confinis Zett. 



1849. Zett. Dipt. Scand. VIII, 3090, 77 — 78 (Dolichopus). — 1862. 

 Schin. F. A. I, 190. — 1878. Kow. Verhandl. zool. bot. Gesell. Wien, XXVIII, 

 452, 9, Taf. V, Fig. 19. — 1903. Kat. palåarkt. Dipt. II, 323. 



Male. Vertex and frons greyish white or silvery ; eyes with yellowish 

 brown hairs. Epistoma narrow, black, seen from above more or less 

 greyish or whilish shining. Palpi small, black. Occiput grey pruinose; 

 postocular bristles black above, brown or paler to whitish below. 

 Antennæ black, third joint more or less brownish; they are longer 

 than the head, the third joint a little longer than the two basal joints; 

 arista longer than the antennæ. Thorax metallic green, somewhat 

 whitish or bluish white pruinose, most densely and somewhat silvery 

 about the humeri; acrostichal bristles long; scutellum not hairy above. 

 Pleura shghtly greenish, grey pruinose; prothoracic bristles pale, short 

 and fine. Abdomen with the ground colour appearing blackish grey 

 or brown, seen from behind with a very slight green colour; from 

 the base of the second segment it is silvery; the first segment is 

 greenish yellow; on the sides of the second segment translucent yel- 

 low spots, generally also indistinctly present on the third segment; 

 abdomen clothed with short, black hairs, longer at the sides, especially 

 on the second segment: there are long hindmarginal bristles, longest 

 on the first segment; the eighth segment with some long bristles at 

 the end. Venter blackish grey with the first two or three segments yel- 

 low; it has short, blackish hairs and hindmarginal bristles; at the base 

 there are a pair of longer, brownish hairs on each side. The outer 

 lamellæ of the hypopygium somewhat long. Legs with the coxæ 

 grey, yellowish at the apex, front coxæ often to a higher degree; 

 femora and tibiæ yellow, anterior femora sometimes blackish or brown 

 at the base below, hind femora and tibiæ blackish or brown at the 

 apical part; anterior tarsi yellow with only the last joint black, or 

 they are more or less dark to having the last four joints blackish or 

 brown; hind tarsi black or brown, sometimes more or less yellow at 

 the base; hind tibiæ a little thickened towards the apex and the hind 

 metatarsi hkewise somewhat thickened and almost twice as long as 

 the second joint. The legs have short, black hairs, the hind coxæ 

 about five bristles on the outer side; femora haired as in the preceding 

 species, the bristly hairs on the middle femora not long; hind femora 

 with rather long, bristly hairs below on the anterior side, being strong 



