154 Orthorrhapha brachycera. 



vangen at Hillerød and at Boserup; in Jutland at Holstebro, Thisted 

 and Frederikshavn, and on Bornholm at Rønne. My dates are ^-'r, — 

 ^"/s. I took most of my specimens on the common on Amager, 

 where they were flying over small water-pools. 



Geographical distribution : — Europe down into Spain ; the species 

 is not known north of Denmark, and is not recorded from England. 



6. H. chorica Fall. 



1815. Fall. Dipt. Suec. Empid. 24, 18 (Empis). — 1822. Meig. Syst. 

 Beschr. III, 4, 3. — 1842. Zett. Dipt. Scand. I, 357, 28. — 1892. Strobl. 

 Verh. zool. bot. Gesell. Wien, XLII, 108, 3. — 1903. Kat. palåarkt. Dipt. II. 249. 



Male. Vertex and frons velvet black, the latter with a shining 

 point above the antennæ; epistoma greyish black; palpi blackish, 

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

 tennæ black. Thorax black, shining. The dorsocentral bristles uni- 

 serial, the acrostichal bristles biserial, all black; the former a little 

 longer than the latter, and the hindmost of them long. Further a 

 humeral bristle, a posthumeral, about three notopleural, a supraalar 

 and a postalar bristle, all black. Pleura somewhat light grey. Scu- 

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

 velvet black with black hairs, those at the hind margin of the seg- 

 ments somewhat longer. Venter grey, short-haired. Exterior genitalia 

 compressed, with longish hairs at the sides; the lamellæ shining. 

 Legs black; coxæ greyish pruinose; front legs short and robust. Front 

 femora with fine hairs above and below; middle femora with some 

 bristles on the anterior side; hind femora with long, fine 

 hairs above and below; front tibiæ ciliated above and be- 

 low, and with some bristles above, of which the two apical 

 are long; middle tibiæ with some bristlcs; hind tibiæ ciliated 

 and with some bristles above and below. Front tibiæ 

 somewhat thickened towards the apex, metatarsi broad 

 and compressed, rectangular or nearly quadratic, somewhat 

 more than half as long as the tibiæ; they are densely, 

 somewhat longish pubescent on the posterior side and have 



^^'^; ; one or two bristles above towards the apex; the three 

 H. chorica, „ ,, . ... , , i i i n ^ 



front leo- lollowing jomts are very short, much broader than long; 



X 30. also on the posterior tarsi the middle joints are short, the 



third and fourth broader than long on the middle tarsi 



and as long as broad on the hind tarsi. The hairs and bristles black 



or brownish black. Wings a little brownish tinged. Veins chiefly 



black or dark brown; the upper branch of the cubital vein originating 



