Pipunculus. 37 



Skov at the east end of Limfjorden (the author), and on Bornholm 

 at Hammeren (the author) and at Rønne and Almindingen (H. J. 

 Hansen); my dates are ^^5 — "/s. 



Geographical distribution: — Europe down into Italy, towards 

 the north to southern Sweden. 



11. P. Thomsoni Beck. 



1897. Beck. Berl. Entom. Zeitschr. XLII, 67, 29, Taf. II, Fig. 18 et 

 1900. XLV, 229, 29. - 1902. Girsch. Wien. Ent. Zeitg. XXI, 123. - 1915. 

 Beck. Wien. Ent. Zeitg. XXXIV, 66 (Dorylas) et 1921. Wien. Ent. Zeitg. 

 XXXVIII, 150,151. — Cephalops pratorwn Fall. p.p. 1816. Dipt. Suec. Syi-pli. 

 15,1. — P. pratonim 1838. Zett. Ins. Lapp. 579, 1 et 1844. Dipt. Scand. III, 951, 

 2 et 1855. XII, 4682, 2 et 1859. XIII, 6057,2. - 1862. Scliin. F.A. I, 247. - 

 1869. Thoms. Opusc. Entom. II, 120, 20. — 1901. Verr. Brit. Flies VIII, 103, 

 13, fig. 103. — 1910. Kertész, Cat. Dipt. VII, 379 (Dorylas). — P. campestris 

 Schin. (nec Latr.) 1862. F. A. I, 247. — P. ater Strobl, 1894. Mittheil. Nat. 

 Ver. Steierm. XXX, 8, p. p. et 1899. Wien. Ent. Zeitg. XVIII, 147, 116. 



Male. Vertex black, frons brown pruinose, not quite so high as 

 the eye-suture; epistoma whitish grey. Occiput whitish grey, brownish 

 above. Antennæ blaekish, third joint ovate, quite short-pointed, 

 second joint with long hairs above and below. Thorax brown, pruinose 

 all over and dull or dullish, scutellum a little shining, humeral knob 

 of the same colour and thorax not grey behind it; the disc is relatively 

 densely clothed all over with brownish hairs, very slightly longer 

 at the margin of scutellum. Pleura and postscutellum grey, propleura 

 with yellow hairs. Abdomen velvet black, first segment with grey 

 hind margin, the following segments with the hind margins black and 

 brilliantly shining and the margins being broader backwards, so that 

 on fourth segment it occupies one half while the fifth segment is almost 

 quite shining with only a narrow velvet front band ; at the sides there 

 are grey triangular lateral spots; the fifth segment has above two 

 roundish impressions on the middle, one on each side of the middle 

 line. Abdomen is clothed with short, yellowish hairs, longest at the 

 sides, the longer hairs at the sides of first segment slightly pronounced. 

 Hypopygium somewhat large, shining, slightly brownish pruinose, 

 it has a large, oval apical impression with a rather large longitudinal, 

 keel-shaped fold, the end claws are black. Legs black, somewhat 

 pruinose, with the femora rather stout, trochanters, base of femora 

 and knees yellowish, tibiæ with a broad basal part and apex yellowish, 

 on front tibiæ the blaekish ring only present as a patch behind, tarsi 

 brownish yellow, darker outwards with the apical joint black; all 



