112 Orthorihapha brachycera. 



about the apical two thirds; front tarsi with the three middle joints 

 shining on the front side, on the antero-dorsal side with hairs, directed 

 obliquely downwards, and with dense, erect hairs on the antero-ven- 

 tral side; at the apex of the two first joints there is a sHghtly curved 

 bristle on the antero-ventral side; hind femora with one preapical 

 bristle; front tibiæ with bristles above and about two on the postero- 

 ventral side; middle tibiæ with about four to five antero-dorsal, (two 

 of them more dorsal), two postero-dorsal, two antero-ventral bristles 



Fig. 30. Wing of D. festivus c?. 



and one postero-ventral bristle. Hind tibiæ with two dorsal rows, 

 one ventral bristle towards the apex, and a ventral row of small 

 bristles ; middle metatarsi with one bristle above, hind metatarsi with 

 about three bristles above, some anterior and small ventral bristles. 

 Wings yellowish or light brownish tinged; veins black or blackish 

 brown, costa with a somewhat large, elongated swelling; discai vein 

 with a large, distinctly angular, but somewhat obtuse bend; axillary 

 lobe somewhat well developed, anal vein going somewhat downAvards. 

 Squamulæ yellow, with a black fringe. Halteres yellow, 



Female. Epistoma broad, greyish white. Antennæ a little shorter 

 than in the male, third joint very short, Abdomen black-haired at 

 the sides. Legs with the front coxæ generally more black-haired; 

 front tarsi simple and hind femora not fringed. Wings without costal 

 swelling. 



Length 5 — 6 mm. 



This species is in the male easily distinguished from trivialis by 

 the shorter antennæ and the bristles on the front tarsi; the female is 

 less easily distinguished, but is known by the much more yellow and 

 a little shorter antennæ, and the larger bend of the discai vein; the 

 species also is larger. 



D. festivus is in Stæger (1. c.) noted as not rare from July into 

 October on bushes and hedges; in my experience it is a rare species, 

 and I have only once taken a single specimen. We have in all eight 

 specimens in the collection, taken on Vester Fælled (Stæger), at Faxe 



