156 Orthorrhapha brachycera. 



with fine hairs and with very fine bristles on the dorsal 



and anterior side. Front tibiæ only sligiitly thicl?:ened to- 



wards the apex, metatarsi somewhat thiclcened and a little 



compressed, straight or slightly concave below, somewhat 



arched above, with longish hairs and some longer, bristly 



hairs above; they are about two thirds of the tibiæ, and 



fully as long as the four following joints; the second to 



fourth joitits are broader than long, the other tarsal joints 



Fig. 54. longer than broad, the fourth joint on the middle tarsi as 



H. pseudo- long as broad. The hairs and bristles are brownish to 

 cHovtcci 

 front le<^. blackish. Wings yellowish or slightly brownish tinged, most 



X 30- towards the anterior margin. Veins brown; the upper 



branch of the cubital vein somewhat diverging, not curved at the 



apex. Stigma brownish. Halteres black. 



Female, Similar to the male. Legs with shorter bristles; front 

 metatarsi simple, scarcely half as long as tibiæ and as long as the 

 three following joints; hind tibiæ distinctly compressed and somewhat 

 curved in the middle. 



Length 2,5 mm. 



This species is easily distinguished from clioriea by the shape of 

 the front metatarsi and exterior genitalia in the male, and in both 

 sexes by the less shining thorax. 



H. pseudorhorica seems very rare in Denmark,, only four specimens 

 have been taken at Frederikshavn in July 1881 (H. J. Hansen). 



Geographical distribution: — Strobl records the species from Au- 

 stria and Garinthia, its northern limit lies thus in Denmark. 



8. H. nigrina Fall. 



1815. Fall. Dipt. Suec. Empid. 24, 19 (Empis). — 1822. Meig. Syst. 

 Beschr. III, 4, 5, Taf. XXII, Fig. 5. — 1842. Zett. Dipt. Scand. I, 354, 24. 

 — 1862. Schin. F. A. I, 115. — 1892. Strobl, Verh. zool. bot. Geseli. Wien, 

 XLII, 111, 5 b. — 1903. Kat. palåarkt. Dipt. II, 253. 



Male. Vertex and frons duU black; epistoma grey; palpi greyish 

 black, with long, blackish hairs. Occiput grey or dull black, according 

 to the direction in which it is seen; it has blackish hairs. Antennæ 

 black, the style somewhat long. Thorax black, slightly shining. The 

 dorsocentral and acrostichal bristles somewhat long, black; the former 

 uniserial, longer behind, the latter quadriserial. Further a humeral 

 bristle, a posthumeral, three notopleural, a supraalar and a postalar 

 bristle, the two latter specially long, all black. Pleura grey. Scutellum 

 with four black marginal bristles, the inner longest. Abdomen black, 

 rather dull, clothed with black hairs, and with somewhat long bristles 



