200 



Orthorrhapha brachycera. 



2. H. obscurellus Fall. 



1823. Fall. Dipt. Suec. Dol. 13,11 (DoUchopus). — 1824. Meig. Syst. 

 Beschr. IV, 101,49 (DoUchopus). — 1831.Stann. Isis 183 1,254, 43 (DoUchopus). 

 — 1843. Zett. Dipt. Scand. II, 584, 73 (DoUchopus). — 1862. Schin. F. A. 

 I, 227. — 1903. Kat. palåarkt. Dipt. II, 314. — Medeterus appendiculatus 

 Macq. 1827. Soc. Se. Lille, 45, 5. — 1834. Meig. Syst. Beschr. VII, 157, 

 29. — Syhistroma appendiculata 1842. Stæg. Krøyer's Tiddskr. IV, 7, 3. 



Male. Head broader than high. Vertex and frons light grey; 

 ocellar tubercle dark. Epistoma narrow, whitish grey. Palpi dark. 

 Occiput a little greenish, grey pruinose; postocular bristles black above, 

 yellowish below. Antennæ black, as long as or slightly longer than the 



Fig. 60. Antenna of H. obscurellus c?, from the inside. X 60. 



head, the third joint elongated, longer than broad, somewhat laneet- 

 shaped; arista with the first joint shorter than the second. Thorax 

 obscure æneous or green, slightly pruinose, somewhat shining; humeral 

 callus slightly brownish. Pleura slightly æneous, grey pruinose, meta- 

 epimera yellow; propleura with fine, pale hairs and a black prothor- 

 acic bristle. Abdomen æneous green, sometimes more or less coppery, 

 very slightly pruinose downwards; it is clothed with short, black hairs, 

 somewhat brownish at the sides, and it has short hindmarginal bristles, 

 longer towards the end, and long at the sides of the first segment. 



Fig. 61. H. obscurellus. Hypopygium; penis-sheath, ventral lobe 

 and outer lamella are seen. 



Venter greyish, with short, yellowish hairs. Hypopygium yellow, the 

 basal part and the eighth segment black, the letter with partly pale 

 hairs; the ventral lobes long and very thin, the apex dilated, black, 

 and with a fan of long, pale yellow, curved hairs; at the ventral 

 margin a little more forwards is a single hair; the sheath of penis 



