108 Orthorrhapha brachycera. 



here, I must refer to Zetterstedt's description. The epistoma is 

 somewhat narrow, ochraceous. Antennæ black, Postocular bristles 

 yellowish below, but tlie lowermost are black. Legs dark yellow 

 or reddish yellow, front coxæ grey at the base, posterior coxæ gray; 

 all tarsi, also the hind ones, have the apex of metatarsus and the 

 four following joints black, Posterior femora wlth one preapical 

 bristle; middle tibiæ with one ventral bristle. Wings slightly tinged, 

 with a snow-white spot at the apex, stretching from the cubital vein 

 to somewhat below the apex and bordered inwardly by an oblique 

 line; discai vein with a not small, but quite obtuse bend; axillary 

 lobe large. Squamulæ yellow, with a black fringe. Halteres yellow. 



Length 4,8 mm. 



The female seems not to be known; Zetterstedt had only the 

 male, and also Kowarz (Wien. Ent. Zeitg. III, 1884, 55) mentions only 

 the male. 



In spite of the deficient description, the species is at once recog- 

 nised by the white spot on the wings; also the colour of the post- 

 ocular bristles is characterlstic, as there are black bristles downwards 

 at the mouth aperture; this is an interesting character, it is also 

 found in D. perversus Loew, but this species has black legs and no 

 spot on the wings. 



D. apicalis is very rare in Denmark, only one male specimen is 

 known, taken by Jacobsen at Sorø on ^/s 1845, and described by 

 Zetterstedt. 



Geographical distribution: — So far as I am aware the species is 

 only known from Denmark and Bohemia. 



25. D. trivialis Hal. 



1831. Hal. Zool. Journ. V, 363,18. — 1862. Schin. F. A. I, 220. — 

 1903. Kat. palåarkt. Dipt. II, 305. — DoUchopus interniedius Stæg. 1842. 

 Krøyer's Tidsskr. IV, 20, 10. — 1843. Zett. Dipt. Scand. II, 537, 31, et 

 1852. XI, 4288, 31. 



Male. Vertex and frons green. Epistoma somewhat narrow, yel- 

 lowish white or light yellowish grey. Palpi yellow. Occiput green, 

 greyish pruinose; postocular bristles yellow below, black above. An- 

 tennæ a little elongated, as long as the head, first joint somewhat 

 long, the third joint longer than broad, the lower margin convex, the 

 upper straight and thus the point dorsal; the antennæ are blackish 

 or brownish, the first joint yellow beneath and also the second joint 

 sometimes a little yellow beneath. Thorax green, sometimes more 

 golden green, rarely bluish green; often it has a more golden middle 

 stripe; it is slightly pruinose, somewhat shining; scutellum fmely yel- 



