146 Orthorrhapha brachycera. 



Geographical distribution : — Northern and middle Europe, down 

 into the Alps; towards the north to northern Scandinavia, and in 

 Finland. It occurs also in North America. 



43. D. ungulatus L. 



1758. Linn. Syst. Nat. Ed. X, I, 598,76 {Musca). — 1805. Fabr. Syst. 

 Antl. 266, 3. — 1823. Fall. Dipt. Suec. Dol. 9, 2. — 1824. Meig. Syst. 

 Beschr. IV, 80, 13. — 1831. Stann. Isis 1831, 130, 25. — 1842. Stæg. 

 Krøyer's Tidsskr. IV, 33, 25. — 1843. Zett. Dipt. Scand. II, 501, 2, et 

 1849. VIII, 3075, 2, et 1855. XII, 4622, 2. — 1903. Kat. palaarkt. Dipt. 

 II, 305. — Nemotelus aeneus De Geer, 1776. Mern. VI, 194, 4, Tab. XI, 

 Fig. 14—22, Tab. XII, Fig. 1 — 3. — Dolkhopus aeneus 1862. Schin. F. A. 

 I, 222. — Dolkhopus chalyheus Meig. (nec Wied.) 1824. Syst. Beschr. IV, 

 79, 10. 



Male. Vertex and frons green. Epistoma narrow, greyish white, 

 or light yellowish grey. Palpi black. Occiput green, greyish pruinose; 

 postocular bristles black. Antennæ black, not as long as the head, 

 third joint not longer than broad, triangular. Thorax green or æneous, 

 rarely bluish, often with a more golden or coppery middle stripe, 

 sometimes divided into two; it is slightly pruinose, shining; scutellum 

 fmely yellow pubescent ; postscutellum greenish, grey pruinose. Pleura 

 green or æneous, grey pruinose; propleura with fine, pale or brown 

 hairs and a black prothoracic bristle. Abdomen green or more or 

 less golden or coppery, with very narrow, dark hind margins to the 

 segments, or these wanting; it is very slightly greyish white pruinose 

 at the sides, and is clothed with short, black hairs; it has hind- 

 marginal bristles, somewhat long on the first and also on the fifth 

 segment. Venter green, greyish pruinose; it has yellowish hairs, which 

 on the third segment are somewhat long and directed forwards and 

 outwards. Hypopygium æneous black, greyish pruinose; eighth segment 

 with long, black hairs; the posterior ventral lobes not or almost not 

 projecting beyond the end of the hypopygium; they bear a little style 

 at the apex; the inner lamellæ curved downwards, not long, the 

 median high and dilated at the base, the lateral have a small dilata- 

 tion at the apex; the outer lamellæ are somewhat narrowed towards 

 the base, broad at the end, with the dorsal margin straight; they are 

 whitish or pale yellowish, with a broad, black margin at the end and 

 a narrow margin at the ventral edge; there are only a pair of teeth 

 with black, curved hairs at the dorsal corner, and dorsally to them 

 a pair of curved hairs; the rest of the apical margin has somewhat 

 curved hairs, the ventral margin shorter, straight hairs; on the inside 



