138 Orthorrhapha brachycera. 



triangular, pointed, somewhat shining; they are directed straightly 

 backwards; there is a somewhat large, triangular ventral lamella and 

 at the apex of this a pair of long, thin styles. Quite hidden in the 

 interior there is a curious, three-branched, reddish penis. The ventral 

 and the lower lamellæ are long-haired, the upper lamellæ short- 

 haired. On account of the bending of the sixth segment the genitalia 

 lie at a lower level than abdomen. Legs black; coxæ greyish pruinose; 

 the posterior femora except the apex and the hind tibiæ in the 

 middle to a greater or less extent reddish, also the front femora 

 generally more or less reddish at the base. Front femora with some- 

 what long, fme hairs below; middle femora with shorter, but stronger, 

 bristly hairs below, and hind femora with short hairs and bristles; 

 front and middle tibiæ densely haired with longish hairs and some- 

 what longer, bristly hairs above, and the former with a short, dense, 

 pale pubescence, the latter with a short ciliation below; hind tibiæ 

 with bristles above and short ciliated below; the posterior tarsi 

 slightly spinulous below, and all tarsi with bristles at the apex of 

 the joints; the hairs and bristles on the dorsal side of the tibiæ 

 are continued in about the same way out on the metatarsi, and like- 

 wise the pubescence below the front tibiæ. All hairs and bristles 

 black. Wings somewhat broad,' strongly brownish tinged. Veins 

 brown, the lower branch of the eubital fork bending distinctly down- 

 wards, slightly recurved at the apex and terminating just before the 

 apex of the wing. Stigma dark brown. Halteres yellow. 



Female. Frons broad, grey, with a median impression. Thorax 

 and abdomen not shorter haired than in the male; the lamellæ of 

 the ovipositor somewhat long. Legs somewhat more reddish than in 

 the male; the posterior tibiæ reddish except the tip, the front tibiæ 

 more or less reddish at the base. The legs haired about as in the 

 male, but the anterior tibiæ not densely haired above, but only with 

 bristles. Wings very broad with a broadly rounded apex, strongly 

 brown tinged. 



Length 6,5 — 7,5 mm. 



E. horealis is not to be termed common in Denmark, and it has 

 not been taken many times; Bagsværd, Tyvekrog, Grib Skov and in 

 Jutland at Silkeborg, at the latter place in no small number. It is 

 with us exclusively a spring species, my dates are only ''/5— ^^Z-'^; I have 

 taken it in copula on ^^'/5. It occurs in woods. Fabricius and Zetter- 

 stedt record, that it hovers in the air towards evenlng; according to 

 Zetterstedt it frequents the flowers of Salix and goes up in the 

 mountains to where the region of Salix ends; he records it from 



^75 — Vs. 



