236 Orthorrhapha brachycera. 



the real arista is a little shorter than the third joint). Thorax black- 

 ish brown, a little greyish pruinose, the humeri and a median, back- 

 wards broader stripe yellow; the yellow colour of the humeri some- 

 times continued stripe-like a little backvvards. The short hairs on the 

 disc pale. There is a yellow notopleural bristle. Scutellum yellow, 

 postscutellum brownish black; scutellum has only short hairs. Pleura 

 yellow, meta- and hypopleura .black, somewhat greyish pruinose. Ab- 

 domen brownish black, with very short. pale hairs; the last segment 

 and the hind margin of the foregoing yellow, so that there is a yel- 

 low, transverse band in front of the genitalia. Venter yellow. Geni- 

 talia black, large and swollen, the upper lamellæ with hooks at the 

 apex, the ventral lamella long, triangular, pointed. Legs yellow, the 

 tarsi slightly brownish at the end; front coxæ long, almost as long as 

 the femora. The legs are short-haired with yellow hairs, the front 

 femora and tibiæ armed in the usual way. Wings hyaline. Veins yel- 



^"iinniiliiiiiilii'Mii 



Fig. 10'2. Wing of H. raptoria. 



lowish brown; there is no discai and no anal cell, the anal vein wan- 

 ting, and the lower branch of the postical vein only indicated; the 

 radial vein is short; the base of the fork of the discai vein lies a little 

 more apically than the apex of the radial vein. No stigma. Halteres 

 whitish yellow. 



Female. Agreeing with the male; eyes likewise touchlng below the 

 antennæ and with the facets in front enlarged. Ovipositor black, in front 

 of it a yellow, transverse band. 



Length 2,8 — 3,5 mm. 



H. raptoria has only been taken once, but in rather great num- 

 ber, in Lersøen at Copenhagen on ^Vs 1841; it was found sitting on 

 reeds. 



Geographical distribution: — Northern and middle Europe down 

 into France; towards the north to northern Sweden, and in Finland. 



5. H. oratoria Fall. 



1815. Fall. Dipt. Suec. Empid. 10, 12. et 34, 12 {Tachydromia). — 

 1822. Meig. Syst. Beschr. III, 63, 3, Tab. XXIII, Fig. 12. — 1842. Zett. 



