Dolichopodidae. 109 



low pubescent; postscutellum greenish, grey pruinose. Pleura green 

 or æneous, greyish pruinose; propleura with fine, pale hairs and a 

 black prothoracic bristle. Abdomen green, with more or less distinct 



Fig. 27. Antenna of D. trivialis d", from the inside. X 65. 



golden or coppery reflexes; sometimes it is bluish; it is sligiitly whitish 

 pruinose downwards; dark hind margins to the segments are very 

 narrow or wanting; abdomen clothed with short, black hairs, and 

 has somewhat short hindmarginal bristles, longer on the first segment. 

 Venter greyish, distinctly pale-haired. Hypopygium not large, æneous 

 black, greyish pruinose; the eighth segment with black hairs; the 

 posterior ventral lobes project a little, they are narrow and pointed, 

 and with a fine hair towards the apex; the inner lamellæ curved 

 downwards, the median thin, pointed, the lateral dilated, with a dilata- 

 tion at the apex ; the outer lamellæ somewhat trapeze-shaped, whitish 

 or yellowish white with a narrow, blackish margin along the ventral, 

 apical and posterior part of dorsal edge, the latter broadest; at the 

 end there are some long teeth with curved hairs, increasing in length 

 towards the dorsal corner; the ventral margin serrated, with shorter 

 hairs, and on the inside with inwards directed hairs. Legs yellow, 

 front coxæ a little whitish pruinose, posterior coxæ grey with the 

 apical part yellow, the hind coxæ somewhat more yellow and yellow 

 behind; anterior tarsi with the apex of metatarsus and the four fol- 

 io wing joints black; hind tibiæ scarcely or slightly darkened at the 

 apex, hind tarsi black. Legs with short, black hairs, hind femora a 

 little longer haired above towards the base, and with a fringe of long, 

 yellow hairs below in the apical half; the front tarsi with short, dense, 

 erect hairs on the anterior side of the three middle joints, and with 

 a bristle at the apex of metatarsus on the anterior side; posterior 

 femora with one preapical bristle; front tibiæ with bristles above and 

 generally one on the postero-ventral side; middle tibiæ with about 

 four antero-dorsal bristles (the two more dorsal), two postero-dorsal, 

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

 rows of bristles, one ventral bristle towards the apex, and besides a 

 ventral row of smaller, but however somewhat long bristles; middle 

 metatarsi with one bristle above; hind metatarsi with about two 

 dorsal, two anterior, and smaller ventral bristles. Wings slightly 



