150 Orthorrhapha brachycera. 



brown; the upper branch of the cubital vein* somewhat diverging. 

 Stigma brown. Balteres brownish black. 



Female. Similar to the male; the bristles on thorax of the same 

 length. Front metatarsi simple, not half as long as tibiæ and shorter 

 than the four following jomts, the whole tarsus about as long as the 

 tibia; hind tibiæ simple. 



Length 2,8 to fully 3 mm. 



This species is similar to cornicula, but distinguished by the bi- 

 serial acrostichal bristles and the strongly tinged wings. 



H. coracula is very rare in Denmark, only two specimens, a male 

 and a female have been taken, on Falster at Resle on ^^/s 1882 

 (H. J. Hansen). 



Geographical distribution: — The species is only known from 

 Denmark. 



3. H. clypeata Meig. 



1822. Meig. Syst. Beschr. III, 4, 4. - 1842. Zett. Dipt. Scand. I, 356, 

 27. - 1862. Schin. F. A. I, 114. - 1892. Strobl, Verh. zool. bot. Gesell. 

 XLII, 106, 2. — 1903. Kat. palaarkt. Dipt. II, 250. 



Male. Vertex and frons velvet black; epistoma dark; palpi black, 

 with blackish hairs. Occiput velvet black, with blackish hairs. An- 

 tennæ black. Thorax black, shining, with a very slight brownish 

 pruinosity, which forms two scarcely discernible stripes on the inter- 

 stitia between the hairs. The dorsocentral bristles irregularly biserial, 

 the acrostichal bristles biserial, all very short, black; the dorsocentral 

 bristles not longer behind. There are some small hairs on the sides 

 of the disc, but of stronger bristles only two notopleural are discernible. 

 Pleura dark grey. Scutellum with four bristles, the inner the 

 strongest. Abdomen black, shining, very slightly greyish ; it 

 has very short hairs and no bristles at the hind margin 

 of the segments. Venter coloured and haired in the same 

 way. Exterior genitalia compressed, with short hairs above. 

 Legs black, coxæ greyish pruinose. The legs are short- 

 haired with black or brownish black hairs; the middle 

 femora with some bristly hairs on the anterior side; the 

 hind femora with fine hairs above and below; all tibiæ 

 short-haired, the hind tibiæ most distinctly. Front meta- 

 Fig.49. Zf.cZ?/- tarsi thickened, somewhat ovate, about twice as broad as 

 Veaia, front ^j^^ ^^^^ ^f ^.j^^ ^jj^jj^ ^ jj^j^ ^]^q^^q^. ^^^^^ i-jj^jgg .^^^^ ^\-^q^^ 



16°'. X 30 

 "" 'as long as the four following joints; the second and third 



joint on the front tarsi very slightly, on the posterior tarsi distinctly 



longer than broad. Wings hyaline, or at most slightly greyish. Veins 



