100 Orthorrhapha brachycera. 



thread-like and very thin towards the apex. The ventral lamella is 

 small, triangular. Legs yellow, coxæ more or less brownish, especially 

 towards the base, and here somewhat greyish pruinose, sometimes 

 quite brown; tarsi darkened towards the apex; the legs may vary 

 somew^hat in colour, generally the hind femora are brown on the 

 basal half, and often the middle femora are likewise brown on the 

 dorsal and ventral side in the basal part, and also the front femora 

 may here be a little darkened. The front femora have fine hairs 

 below and long hairs on the posterior side; the posterior femora have 

 dense, short hairs below, intermingled with longer bristles, which 

 latter are specially strong on the hind femora and placed in two 

 rows, further the posterior femora have also some bristles or bristly 

 hairs on the antero-dorsal side; the tibiæ have a dense pubescence 

 of short hairs ventrally, being longest on the posterior tibiæ; besides, 

 the legs have the ordinary clothing of shorter or longer hairs. The 

 hairs are mainly black, below the tibiæ pale brownish. Wings hyaline, 

 slightly yellowish tinged. Veins dark brown, anal vein thin, reaching 

 the margin but very weak a little before the apex; the apical part 

 of the costal (mediastinal) cell more or less brownish. Stigma very 

 small and narrow, whitish and scarcely observable. Halteres paler 

 or darker yellow. 



Female. Frons a little broader than in the male. The last three 

 abdominal segments suddenly narrowed, brownish, forming a kind of 

 ovipositor, terminating in two styliform lamellæ; the posterior femora 

 have somewhat scaly hairs above and below; the hairs above are 

 only very slightly broadened, those below in the apical half part 

 distinctly scaly; the hind femora have rows of bristles below; the 

 posterior tibiæ are densely haired below with somewhat strong hairs, 

 and they have rows of bristles, especially on the dorsal side. The 

 wing-stigma more obvious than in the male but however very 

 faint. 



Length 4—6 mm. 



This species varies somewhat in colour, especially of the legs; I 

 have only considered the varieties known from our country, and 

 these have always a blackish, sometimes a little brownish abdomen. 

 The varieties mentioned by Strobl (Mitth. Ver. Steierm. 1892, 85) with 

 the abdomen quite brown, or brown with black bands at the base 

 do not occur here. 



E. grisea is somewhat common in Denmark; Ordrup Mose, 

 Charlottenlund, Ørholm, at Skelskør; on Fænø and in Jutland in Vejle 

 Nørreskov, at Horsens, Silkeborg, Laven near Silkeborg and at Fre- 

 derikshavn; my dates are ^'^U — ^^/s. It occurs in woods, fens and 



