576 Syrphidae. 



4. C. vernale Loew. 



1841. Loew, Stett. ent. Zeitg. II, 159, 4 et 1856. Verh. zool. bot. Geseli. 

 Wien, VI, 612, 10. — 1843. Zett. Dipt. Scand. II, 637, 6 et 1859. XIII, 

 5075, 6. — 1862. Schin. F. A. I, 225. — 1901. Verr. Brit. FL VIII, 652, 6, 

 fig. 447. — 1907. Kat. palåarkt. Dipt. III, 151. 



This species is very similar to festivum, but the antennæ are a 

 little shorter, the second joint shorter than the first, and the third 

 joint not much shorter than the two basal joints together. The grey 

 lines on thorax are narrower; the spots on pleura smaller and the 

 one above on sternopleura often wanting. The anterior femora with 

 about the basal fourth black. The cubital vein is curved a little less 

 downwards. 



Length about 11,5 mm. 



In spite of the great similarity to festivum the species seems, 

 however, to be quite distinct and valid. 



C. vernale is very rare in Denmark, we have only three specimens, 

 a male and two females; two of the specimens are taken at Tisvilde 

 on ^^h 1913 and '^/e 1915 (J. G, Nielsen) and one on Bornholm in July 

 1892 (Løvendal). 



Geographical distribution: — Europe down into Spain and Italy; 

 towards the north to middle Sweden, and in Finland. 



5. C. bicinctum L. 



1758. Linn. Syst. Nat. X, 592 et 1767. XII, 2, 985,38 et 1761. Fn. 

 Suec. 1805 {Musca). — 1775. Fabr. Syst. Entom. 767, 21 (Syrphus) et 1805. 

 Syst. Antl. 183, 2 (Mulio). — 1776. O. F. Mull. Zool. Dan. Prodr. 2019. 

 (Blusca). — 1816. Fall. Dipt. Suec. Syrph. 6, 3 (Mulio). — 1822. Meig. Syst. 

 Beschr. III, 168, I. — 1843. Zett. Dipt. Scand. II, 638, 7. — 1841. Loew, 

 Stett. ent. Zeitg. II, 159, 1 et 1856. Verh. zool. bot. Geseli. V^ien, VI, 613, 14. 



— 1862. Schin. F. A. I, 255. — 1901. Verr. Brit. Fl. VIII, 653, 7, fig. 448. 



— 1907. Kat. palåarkt. Dipt. III, 146. 



Male. Vertex black, grey on the hinder half; frons black, very 

 slightly pruinose just along the eye-margins ; epistoma yellow or whitish 

 yellow with a broad middle stripe and the lower side parts black; 

 vertex with blackish brown, posteriorly with yellow hairs; frons with 

 yellow hairs, anteriorly generally black; epistoma with whitish or yel- 

 lowish hairs. Jowls brownish orange. Occiput whitish, almost silvery 

 pruinose along the eye-margins, the hairs white below, yellow above, 

 and here also some black hairs. Eyes with moderately long and dense, 

 pale brownish hairs. Antennæ black, with the third joint much shorter 

 than, almost only half as long as the two basal joints together, the 



