166 Orthorrhaplia bracliycera. 



with four black marginal bristles. Abdomen greyish brown, clothed 

 with yellow hairs, and with not long, dark marginal bristles on the 

 segments. Venter similarly coloured, short-haired. Exterior genitalia 

 of medium size, somewhat compressed, the lameilæ slightly shining, 

 with longish, brownish hairs above. Legs black, greyish pruinose, 

 knees narrowly yellowish; coxæ grey; hind femora shining black on 

 the posterior side in the basal part. F'ront femora with fme hairs on 

 the posterior side; middle femora with longish hairs on the anterior 

 side and below; hind femora with long hairs above and towards the 

 apex below; front tibiæ with some bristles above; middle tibiæ with 

 a rovv of hairs on the antero-dorsal side, a row of longer, bristly 

 hairs on the posterior side and some ventral bristles towards the 

 apex; hind tibiæ with a dorsal and an anterior row of bristles. Front 

 tibiæ thickened towards the apex, metatarsi thick, somewhat shorter 

 than tibiæ and about as long as the four other joints together; they 

 are a little longer haired above than below; the three middle joints 

 about as long as broad; on the middle tarsi the three middle joints 

 a little longer, the fourth about as long as broad, and on the hind 

 tarsi the joints longer. The hairs are chiefly yellowish, the bristles 

 black. Wings slightly yellowish tinged. Veins dark brown to black; 

 the upper branch of the cubitai vein arising about rectangularly, 

 somewhat diverging, not curved at the apex. Stigma brownish yellow. 

 Halteres yellow. 



Female. Similar to the male; thorax more grey on the middle 

 between the inner stripes. Front metatarsi simple, half as long as 

 tibiæ; and as long as the three folio wing joints; all tarsal joints 

 longer than broad, the fourth joint on the middle tarsi shortest; hind 

 tibiæ slightly compressed and a little curved in the middle. 



Length 4—4,5 mm. 



This species resembles pnbipes, but it is of a more brownish co- 

 lour, the male has not densely haired middle tibiæ, and the female has less 

 curved hind tibiæ; besides the acrostichal bristles are mainly biserial. 



H. quadrivittata is very rare in Denmark, only tw^o specimens, a 

 male and a female, are known, one taken at Skodsborg many years 

 ago (Stæger), and one in a garden at Copenhagen (the author); it was 

 taken in June, 



Geographical distribution: — Northern and middle Europe down 

 into France; I think it is not known with certainty north of Denmark, 

 since quadrivittata in Zetterstedt is in all probability H. carinthiaca 

 (see under this species). It occurs also in North America in Alaska, 

 (if the American species described as H. quadrivittata Meig. is really 

 this species). 



