38 Pipunculidae. 



femora shining below, hind femora also on posterior side; the legs 

 short-haired, middle femora with a ratlier long, pale ciliation behind, 

 front and hind femora with a similar, but miich less dense and con- 

 spicious ciliation, and all femora with a double row of small spinules 

 below the apical half or on middle femora two thirds. Wings a little 

 brownish tinged, stigma brown, longer than next costal segment, 

 middle cross-vein at the first third of the discai cell. Halteres brownish 

 yellow. 



Female. Frons quite whitish grey, without any keel; antennæ 

 brownish, a little more pointed than in the male. Tliorax more greyish 

 pruinose, especially at the sides, Abdomen all shining, with distinct 

 whitish grey triangular lateral spots, with first segment grey, and 

 with second likewise grey, but more brownish on the disc. Hypopygium 

 with an oval, black and shining basal part, the reddish ovipositor 

 straight or almost straight, slightly longer than the basal part. Legs 

 with tibiæ paler than in the male, the blackish ring smaller and much 

 less distinct. Wings with the stigma a little shorter than next costal 

 segment. 



Length 4 — 5 mm. 



P. Thomsoni is more common in Denmark than spinipes, Dyre- 

 haven (H. J. Hansen), Ruderhegn (Schlick), Ørholm, Bogø south of 

 Sealand, on Langeland at Lohals (the author), on Lolland at Lyse- 

 mose and in Merrits Skov (Schlick), onFunen at Middelfart and in Jut- 

 land at Hejls south of Kolding (the author); the dates are Ve — ^V?. 



Geographical distribution: — Northern and middle Europe down 

 into Bohemia and probably into Spain; towards the north to northern 

 Sweden. 



Remarks: Becker (1. c. 1921, 157) thinks that omissinervis Beck. 

 and carinatus Verr. are no doubt only aberrations or monstrosities 

 of Thomsoni, and this opinion may I think, be correct, at all events 

 as regards the former species. 



12. P. ater Meig. 



1824. Meig. Syst. Beschr. IV, 23, 9. - 1844. Zett. Dipt. Scand. III, 

 953, 4 et 1855. XII, 4682, 4 et 1859. XIII, 6057, 4. - 1862. Schin. F. A. 

 I, 247. - 1869. Thoms. Opusc. Entom. II, 119, 19. - 1894. Strobl, Mittheil. 

 Nat. Ver. Steierm. XXX, 5, p. p. — 1897. Beck. Berl Entom. Zeitschr. XLII, 

 68, 30, Taf. II, Fig. 20 et 1900. XLV, 229, 30 et 1915. Wien. Ent. Zeitg. XXXIV, 

 64 (Dorylas) et 1921. Wien. Ent. Zeitg. XXXVIII, 150, 151. - P. cam festris 

 Latr. 1804. Hist. Nat. Crust. et Ins. XIV, 392? — 1901. Verr. Brit. Flies VIII, 

 99, 12, figs. 94, 99-102. - 1910. Kertész, Cat. Dipt. VII, 370, p. p. {Dorylas). 



