Dolichopodidae. 297 



above and at the apex; anterior tarsi with about the apex of meta- 

 tarsus and the four foUowing joints brovvn; hind tibiæ brown or 

 blackish, generally darkest at the base, hind tarsi black or blackish. 

 Middle coxæ with a distinct, yellow apical spine; the front metatarsus 

 fully as long as the three foUowing joints, a little dilated below at 

 the apex; hind metatarsus shorter than the second joint. The legs 

 have short, black hairs. the coxæ are pale-haired; front coxæ with 

 two or three, middle coxæ with one or two and hind coxæ with one 

 black bristle; middle femora with one or a pair of preapical bristles 

 on both sides, hind femora without preapical bristle; front tibiæ with 

 some bristles above, posterior tibiæ with two antero- and two postero- 

 dorsal bristles. Wings brownish tinged; veins black, discai vein some- 

 what curved, and the discai and cubital vein somewhat converging. 

 Squamulæ yellow, with a yellow fringe. Halteres pale yellow. 



Female. Epistoma broad, whitish grey. Palpi large, grey. An- 

 tennæ short, the third joint triangular, the arista twice as long as 

 the antennæ. Legs as in the male, hind tibiæ generally paler, but 

 not yellow, yellowish brown to dark brown, especially at the base 

 and apex; middle tibiæ with one or two small ventral bristles; middle 

 coxæ without apical spine. Wings a little more strongly tinged. 



Length 3,2 — 3,7 mm. 



While this species is in the male easily recognised, the female is 

 very difficult to distinguish from the female of caliginosum; Loew 

 says (Stett. ent. Zeitg. 1. c.) that the tarsi are longer, but this I find 

 scarcely confirmed, perliaps the anterior tarsi may prove to be very 

 shghtly longer; the characters by which I distinguish it, is that the 

 arista seems to be a little longer, the hind tibiæ are darker, though 

 sometimes only slightly, the hind metatarsus not pale at the base, 

 the wings more tinged, and the size larger. As Zetterstedt says: 

 "Stæg. in litt." the species is originally separated off by Stæger, and 

 the name due to him. 



X. (ippendiculatum is as coinmon in Denmark as caliginosum; at 

 Copenhagen, Ordrup Mose, Hillerød, Nyraad at Vordingborg, and on 

 Bornholm in Almindingen, at Rø and Læsaa. My dates are ^k — ^"/s. 

 It occurs in similar localities as caliginosum. 



Geographical distribution: — Northern and middle Europe down 

 into Austria and Hungary, and further in Asia Minor; towards the 

 north to southern Sweden, and in Finland. 



18. Systenus Loew. 

 Species of small size. This genus is the last of the genera more 

 or less related to Porphyrops, and it stands somewhat more apart 



