Syrphus. 333 



mainly the ground colour, but there are many pale hairs on second 

 segment; at the sides the hah"s are pale at the base down to the 

 second pair of spots, after which they alternate black and white. 

 Venter whitish with black, transverse bands on third, fourth and fifth 

 segments. Anterior legs yellowish, femora with a black ring near the 

 base, tibiæ with traces of a ring below the middle and tarsi with the 

 third and fourth joints darkened; sometimes the anterior legs paler 

 wåth only small rings on femora ; hind legs black with only base of 

 femora yellow and the knees obscurely pale; the hairs all pale. Wings 

 a little tinged. Squamulæ white. Balteres yellow. 



According to the descriptions the male has a rather elongated 

 triangular vertex, the frons yellow^ with just the upper angle blackish ; 

 the abdominal spots seem often to be more triangular. 



Length fuUy 7 to about 8,5 mm. 



Remarks: All the earlier descriptions of this species raention the 

 spot or two spots on thorax in front of scutellum, and also all my 

 specimens (females) possess them, but according to Verrall they may 

 be wanting in both sexes, but especially in the male. 



S. guttatus is rare in Denmark ; Copenhagen in a garden. Lersø, 

 Charlottenlund: on Lolland at Strandby, and in Jutland at Haarup 

 near Horsens and at Thisted, in all only six specimens, all females. 

 The dates are ^'h—^^k. 



Geographical distribution : — Northern and middle Europe down 

 into Austria, Hungary and Styria; towards the north to northern 

 Sweden, and i Finland, but upon the whole rather rare. 



3L S. umbellatarum Fabr. 



1794. Fabr. Ent. Syst. IV, 307. 107 et 1805. Syst. Antl. 250, 9 

 {Scaeva). — 1817. Fall. Dipt. Suec. Syrph. 44, 15 (Scaeva). — 1859. Zelt. 

 Dipt. Scand. XIII, 5098, Obs. (Scaeva). — 1862. Schin. F. A. I, 308. — 

 1901. Verr. Britt. FL VIII, 409, 30. — 1907. Kat. palåarkt. Dipt. III, 71. — 

 S. amoenus Loew, 1840. Programm Posen, 35, 15 et Isis 1840. 572, 15. 



Male. Vertex a little elongated triangular; frons yellow pruinose, 

 black above the antennæ but yellow just at the antennæ; epistoma 

 yellow, bluish æneous reflecting, yellowish grey pruinose; the front 

 mouth edge black and from here a black line extends up over the 

 central knob. Jowls yellow. Vertex and frons black-haired, epistoma 

 with pale hairs but black above and at the sides. Occiput grey pruinose, 

 the hairs white below, yellow upwards; above a row of black, over- 

 hanging hairs. Eyes bare. Antennæ black, not quite short, third 

 joint somewhat oval ; arista as long as the antennæ. Thorax æneous, 

 shining, with somewhat long, dark yellow or brownish yellow hairs, 



