3 16 Syrphidae. 



species. It occurs in woods and thickets and often in gardens, 1 

 think more often in gardens than on any other locality. 



Geographical distribution : — Europa down into Spain and Italy ; 

 towards the nortli to iniddle Sweden. 



22. S. balteatus De Geer. 



1776. De Geer, Mém. Ins. VI, 116, 7 (Musca). — 1822. Meig. Syst. 

 Beschr. III, 317, 57. — 1843. Zett. Dipt. Scand. II, 721, 24 et 1849. VIII, 

 3149, 24 (Scaeva). — 1862. Schin. F. A. I. 309. — 1901. Verr. Brit. Fl. 

 VIII, 390, 22, fig. 302. ~ 1907. Kat. palåarkt. Dipt. III, 60. — Syrphus 

 nectareus Fabr. 1787. Mantis. Ins. II, 341 et 1794. Ent. Syst. IV, 309, 

 116 et 1805. Syst. Antl. 253, 22 {Scaeva). — 1817. Fall. Dipt. Suec. Syrph. 

 43, 14 {Scaeva). 



Male. Head as high as broad, frons and epistoma narrow. Vertex 

 very elongate, yellowish pruinose; frons yellovv, a little greyish dusted 

 behind; epistoma yellow, whitish yellow pruinose, the central knob 

 shining; near the lower corner of the eye a blackish spot, Jowls 

 grey. Vertex yellow-haired, frons with black hairs; epistoma yellow- 

 haired, above at the sides some black hairs. Occiput greyish pruinose, 

 the hairs whitish below, yellow upwards, no black hairs above. Eyes 

 bare. Antennæ yellovv or reddish yellow, third joint more or less 

 dark above ; the third joint oval but rather short, not longer than the 

 two basal joints together; arista longer than the antennæ. Thorax 

 æneous or brass-coloured, sometimes a little purplish, shining; it has 

 three faint, greyish, longitudinal stripes, the median the narrowest; 

 also the sides a little greyish so that between the stripes four darker 

 stripes may be seen; the thorax is clothed with yellow hairs, a little 

 denser at the sides. Scutellum yellow, with long, black hairs, at the 

 basal corners a few yellow hairs. Pleura grey pruinose, somewhat 

 sparingly clothed with pale yellow hairs. Abdomen somewhat narrow 

 and parallel-sided, dull, somewhat shining at base and apex; it has 

 extensive yellow markings so that it is more yellow "than black; it is 

 greenish at the base ; the second segment has close to the front margin 

 two large side spots, which on the inner side have a narrow but deep 

 incision above the middle, and they leave the hind margin black, the 

 part of the spot above the incision sometimes indistinct ; third and 

 fourth segments have each a broad band towards the front margin, 

 occupying three fourths of the segments and a little emarginate behind 

 in the middle; each of the bands has near the front margin a narrow, 

 black band, stretching near or quite to the sides, in the latter case 

 dividing the yellow band into two, a narrow anterior and a broad 

 posterior; the black band is emarginate or inteiTupted in the middle; 



