232 Orthorrhapha brachycera, 



brownish; arista not quite short, Thorax dark grey, with a broad 

 median stripe and the sides lighter, almost yellowish grey; it migtit 

 also be termed yellowish grey with two dark grey stripes. A noto- 

 pleural and a postalar brist le present, both yellow. Scutellum with 

 two yellow marginal bristles. Pleura grey. Abdomen greyish black 

 or dark brown, with short, pale yellowish hairs, especially at the hind 

 margin of the segments. Venter yellow, short-haired. Genitalia with 

 the ventral lamella large, protruding and somewhat bladder-like, the 

 upper lamellæ not excised at the end, blackish, and also the lower 

 lamellæ dark. Legs yellow, the two last joints on the posterior tarsi 

 brown, on the front tarsi only very slightly darkened. The legs are 

 short-haired with yellow hairs, front femora with two rows of very 

 short, black spines below, and outwards to these about five yellow 

 bristles on each side; front tibiæ with short, brown bristles below, 

 and with a strong spine at the apex. Wings hyaline. Veins blackish or 



Fig. 99. Wing of H. precatoria. 



dark brown. Stigma black or blackish brown, roundish, the radial 

 vein forming a curve below it; discai and anal cell present, anal vein 

 long but weak. Halteres whitish yellow. 



Female. Agreeing with the male; the frons very slightly broader. 

 Ovipositor as thick as abdomen, because the eighth segment is long, 

 while the foUowing part is rather small. 



Length 4,2 — 5 mm. 



H. precatoria is rare in Denmark; Ordrup Mose (Stæger), Rørvig, 

 and in Jutland at Hald near Viborg (the author); my dates are ^/e — ^^/s, 

 It occurs at horders of brooks, especially on somewhat shaded piaces, 

 under trees; at Hald I took it in company with the two foUowing 

 species. 



Geographical distribution: — Europe down into Italy; towards the 

 north to middle Sweden, and in Finland. It is also recorded to occur 

 in North America in Canada. 



