Dolichopodidae. 175 



at the apex; axillary lobe somewhat small. Squamulæ pale yellovv, 

 with a black fringe. Balteres yellow. 



Female. Epistoma broader than in the male, but however some- 

 what narrow, grey or yellowish grey. Antennæ somewhat shorter. 

 For the rest quite similar to the male. 



Length 3,5 — 4,5 mm. 



H. gennanus is very common in Denmark and has been taken 

 in many localities through the whole country including Bornholm. 

 My dates are ^/t — ^h. It occurs both in woods and on fields and 

 both on humid and dry localities and not especially near water. Jt 

 is generally present in very great numbers and is especially found on 

 flowers of Umbelliferæ; most often I have taken it on Ghaerophyllum, 

 the flowers of vvhich may often be quite covered by it. The males 

 are then seen hovering quite low over the females resting on the 

 flowers and jerking upon them, but I have however never seen 

 copulation. 



Geographical distribution: — Northern and middle Europe down 

 into France; towards the north to middle Sweden, and in Finland. 



Remarks : This species is very similar to H. chaeroph.ylli but is 

 easily distinguished in the male by the hypopygium, which in chaero- 

 phylli is much larger; the total length of it is like the length of ab- 

 domen, and its anterior part is ascending above the dorsal margin 

 of abdomen, as Schiner correctly states; also both the ventral lobes 

 and inner lamellæ are more slender, and the outer lamellæ longer 

 and narrower, and hence less triangular. The female is less easily 

 distinguished, but may, I think, be known by the discai bend being 

 smaller than in germanus and the cubital and discai veins more 

 parallel, which character is common to both sexes; finally chaerophylli 

 is a smaller species. On the other hånd the intensity of the browning 

 of the wings gives no character. 



Zetterstedt (1. c. VIII, 3086) mentions two female specimens from 

 Denmark, sent to him from Stæger, and which seemed, both to him 

 and to Stæger, a little differring from germanus; in XI, 4295, Zetter- 

 stedt says that one of them belongs to H. chaerophylli, which thus 

 should occur in Denmark; at the place last cited he describes chaero- 

 phylli after Swedish specimens, but the distinguishing characters he 

 gives seem to me not at all to pro ve that it is in reality chaerophylli; 

 thus in VIII he says: "nervis 3 et 4 longitudinalibus versus apicem 

 paullulum magis approximatis", vvhat is contrary to the facts in chaero- 

 phylli. — I have never seen chaerophylli from Denmark, and I think 

 that it does not occur with us, and that both the mentioned specimen 

 from Stæger, as also the other specimens belong to germanus, which, 



