264 Orthorrhapha brachycera. 



Length 3,3 — 4 mm. 



Remarks: The pale hairs on the legs of the male of this species 

 are somewhat easily rubbed off. 



P. nemoriim is somewhat rare in Denmark; Amager (Jacobsen), 

 Damhussø, Fure Sø (the author); in all only eight specimens. My 

 dates are in July. It has been taken at the horders of lakes. 



Geographical distribution : — Northern and middle Europe down 

 into France; towards the north to middle Sweden. 



5. P. crassipes Meig. 



1824. Meig. Syst. Beschr. IV, 50.10, et 1830. VI, 362. — 1843. Zett. 

 Dipt. Scand. II, 466,7, et 1855. XII, 4617,7 {Rhaphium). — 1862. Schin. 

 F. A. 1, 199, — 1903. Kat. palåarkt. Dipt. II, 328. — Rhaphium cylindricmn 

 Zett. 1838. Ins. Lapp. 705, nota. — Rhaphium fulvipes Meig. 1838. Syst. 

 Beschr. VII, 151, 17. — Forphyrops ruffpes Meig. 1824. Syst. Beschr. IV^ 

 52, 14, et 1830. VI, 363. 



Male. Vertex and frons green; eyes whitish-hairy. Epistoma 

 narrow, silvery whiie. Palpi small, grey. Occiput green, a little 

 greyish pruinose; postocular hairs black above, whitish below. An- 

 tennæ black, not as long as the head, third joint not twice as long 



Fig. 81. Antenna of P. crassipes d". X 55. 



as the two basal; arista generally a little longer than the antennæ, 

 but the third antennal joint may vary slightly in length so that the 

 arista is sometimes only as long as the antennæ. Thorax dark green, 

 with two darker stripes in the middle, abbreviated behind; it is slightly 

 greyish pruinose, shining. Pleura green, greyish pruinose; propleura 

 with pale hairs. Scutellum with rather many marginal hairs at the 

 sides. Abdomen green, sometimes æneous or more or less coppery, 

 with darker incisures, and slightly greyish pruinose; it is clothed 

 with short, black hairs, somewhat longer and pale at the sides of the 

 three first segments; there are short hindmarginal bristles, long on 

 the first segment. Venter greenish, grey pruinose, with longish, pale 

 hairs. Hypopygium biackish. the ventral lobes long, thin, attenuated 



