Pollenia. 



137 



in rudis; tarsi more robust, fourth joint, especially on front tarsi, as 

 broad or aboiit as broad as long. Wings not yellow, almost uncoloured 

 or a little brownish; veins 

 blackish. Squamiilæ more or 

 less brown, with the margin 

 whitish. Halteres yellow. 



Female. Similar; a 

 black spot on orbits and 

 cheeks to each side of the 

 base of antennæ much more 

 pronounced than in rudis. 

 Squamulæ paler to whitish. 



Length 7 to about 

 11 mm, tlius in general lar- 

 ger than rudis. 



P. vagabunda is not 

 rare in Denmark; Ordrup 

 Mose, Ermelund, Geel Skov, 

 Hillerød, Grib Skov (the author) and in Jutland at Sønderborg 

 (Wiistnei); the dates are ^^4 — ^Ve- ^^ seems especially to occur 

 early and then again in late summer and autumn. 



Geographical distribution: — Europe down into France; not 

 known with certainty north of Denmark, 



Fig. 24. P. vagabunda, forceps from behind. 



3. P. vespillo Fabr. 



1786. Fabr. Entom. Syst. IV, 318, 26 et 1805. Syst. Antl. 292, 39 (Musca). 

 — 1826. Meig. Syst. Beschr. V, 65, 27 (Musca). — 1862. Schin. F. A. I, 586. — 

 1896. Pand. Rev. Entom. XV, 151, 2. — 1907. Kat. palåarkt. Dipt. III, 528. — 

 1911. Kram. Abhandl. Nat. Geseli. Gorlitz, 27, 41, Tab. III, Fig. 4. — 1924. 

 Stein, Arch. f. Naturgesch. 90, 6, 260, 4. — Musca nitens Zett. 1845. Dipt. 

 Scand. VI, 1340, 12. 



Male. Frons with the orbits touching above, less protruding 

 than in the other species. Orbits, cheeks and jowls brown or greyish 

 brown; frontal triangle black, more or less brownish pruinose. Jowls 

 nearly all reddish-haired, only a little black-haired in front. Occiput 

 grey, with mostly black hairs above, reddish below. Antennæ black 

 or brown, second joint red; third joint about twice as long as second. 

 Palpi black or blackish. Thorax black, dull, unstriped; it has dense, 

 erect brownish hairs, and is covered by felted golden hairs, which 

 as in the other species may be more or less completely lost. Bristles 



