Dolichopodidae. 197 



legs may show sexual characters, such as dilated tarsal joints or 

 peculiar hairs. The legs are haired with short hairs; the coxæ have 

 bristles at the apex, the middle coxæ have a bristle in the middle on 

 the front side at the outer edge, the hind coxæ one in the middle on 

 the outer side; the posterior femora have one preapical bristle; the 

 tibiæ have some bristles in rows, the middle tibiæ three in an antero- 

 dorsal, two in a postero-dorsal row; the front tibiæ have no ventral 

 bristles; there are apical or preapical bristles, small on the front 

 tibiæ. Hind metatarsi without bristles, a little or somewhat shorter 

 than the second joint. There are two claws, two pulvilli and a nar- 

 row, lobe-shaped empodiura with long bristles below. Wings of usual 

 shape, the mediastinal vein terminating in the subcostal vein; the discai 

 vein with a somewhat small and even bend after the cross-vein, and 

 curved up against the cubital vein towards the apex; the posterior 

 cross-vein placed in or before the middle of the wing; the anal vein 

 not reaching the margin. The discai bend lying on a convexity. 

 Squamulæ small, with the angulary lobe moderately developed, bearing 

 a fan of long hairs; the inner part of the squamulæ shorter haired, 



The developmental stages of Hypophyllus are not known. 



The species of Hypophyllus occur on bushes and in low herbage 

 in fens, on meadows and other damp localities in woods, often at 

 the horders of water and also on water piants. 



Of the genus 7 species are known from the palæarctic region; 4 

 have been found in Denmark. 



Tahle of Species. 



Antennæ in the male with the third joint somewhat elong- 

 ated; first joint of the arista very long or somewhat long 

 in the male, longer than or as long as the third joint in 

 the female, inserted about in the middle of the joint or 

 nearer the base. Posterior coxæ and metaepimera yellow. . . 2. 

 Antennæ short, and the first joint of the arista short in 

 both sexes, a little thickened towards the apex, inserted 

 nearer the apex of the the third joint. Posterior, or at 



all events middle coxæ mainly grey, metaepimera grey 3. 



Arista in the male with the first joint twice as long as 

 the second; front tarsi with the fifth joint disciform. In 

 the female the arista inserted a little anterior to the middle 

 of the third joint, the apex of its first joint reaching distinctly 

 beyond the apex of the third antennal joint; middle tarsi 



distincUy longer than tibiæ 1 . discipes. 



Arista in the male with the first joint much shorter than 

 the second; front tarsi simple, hi the female the arista 

 inserted in the middle of the third joint, the apex of its 



