|g Orthorrhapha brachycera. 



Poulton 1. C. records from England the folio wing examples of prey: 

 D. oelmidica: different Ichneumonids {Campoplex leptogaster Holnigr., 

 Cratichneimon annulator F.), Pmiorpa sp., a small moth {Adela?); 

 D. atricapilla: Melohoris rufiventris Grav.; D. rufipes: Blennommpa 

 assimilis Fin., Empis pennipes L., Sphegina dunipes Fin. 



Of the genus 38 species are known from the palæarctic region 6 

 of which have hitherto been found in Denmark. 



Tahle of Species. 



1 . Wings more or less blackish or brownish 2. 



— Wings hyaline or slighlly yellowish 3. 



2. Wings quite brown; legs for the most part ferrugineous 2. oelandica. 



— Wings hyaline at the apical part ; legs black 3. atricapilla. 



3. The hairy stripes on the pleura not fully developed, only 

 consisting of a stripe between the humerus and the 



wing-root ; legs black to a great extent 1 . Eeinhardi. 



— The hairy stripes on the pleura fully developed; the ante- 



rior legs pale 4-. 



4. Abdomen black without yellow markings; tarsi more or 



less blackish 5- 



— Abdomen with yellow, transverse bands; tarsi, at all 



events the anterior, pale 6. linearis. 



5 Antennal tubercle highly prominent; hind legs black ex- 



cept the bases of femora and tibiæ 4. rufipes. 



Antennal tubercle small, hind legs generally less black 5. hyalipennis. 



1. D. Reinhard! Wied. 



1817. Wied. Zool. Mag. I, 2, 37. — 1847. Low, Linn. Entom. Il, 

 412, 2, $. - 1849. Zett. Dipt. Scand. VIII, 2972, 2-3. — 1862. Schin. 

 F. A. 1, 120. — 1903. Kat. palåarkt. Dipt. 11, 107. — 1820. D. cothurnata 

 Meig. Syst. Besehr. II, 244, 6, ?. — 1847. Low, Linn. Entom. II, 420, 7, 

 ?. — 1849. Zett. Dipt. Scand. VIII, 2973, 2-3. 



Male. Face below the antennæ somewhat arched, shining, black, 

 fmely striated, lower down brass-yellow or greyish white pruinose; 

 epistomal beard pale yellow or whitish. Proboscis and palpi black, 

 the former with ferrugineous hairs at the apex, the latter with black 

 hairs. Antennal tubercle small; front and vertex black; occiput black 

 with black hairs, along the posterior eye margin yellow pruinose when 

 seen in certain directions. Antennæ black, the two first joints with 

 black hairs, especially beneath; the first joint scarcely one and a half 

 times as long as the second, the third as long as the two first together. 

 Thorax black somewhat shining, the disc with two brownish pruinose 

 stripes and between these with traces of a median stripe, at all events 

 indicated by punctuation; scutellum rugose; the thoracic disc clothed 

 with very short, black pubescence; the præsutural bristles yellow to 



