454 Syrphidae. 



Geographical distribution: — Northern Europe, towards the north 

 to northern Sweden, in Norway, and in Finland ; it seems to iiave its 

 southern limit in Denmark. 



4. H. pendulus L. 



1758. Linn. Syst. Nat. X, 591 et 1767. XII, 2, 984, 28 et 1761. Fn. 

 Suec. 1995 (Musca). — 1764. O. F. Miill. Fn. Fridrichsd. 712 (Musca). — 

 mb. Fabr. Syst. Entom. 763, 7 {Syrphus) et 1805. Syst. Antl. 233, 7 

 (Eristalis). — 1817. Fall. Dipt. Suec. Syrph. 30, 26 (Syrphus). — 1822. 

 Meig. Syst. Beschr. III, 373, 6. — 1843. Zett. Dipt. Scand. II, 676, 1 et 1849. 

 VIII, 3117,1. — 1862. Schin. F. A. I, 340. — 1901. Verr. Brit. Fl. VIII, 

 531, 3, figs. 364—366. — 1907. Kat. palåarkt. Dipt. III, 109. — 1910. 

 Beck. Berl. ent. Zeitschr. LV, 226. — H. trivittatus Meig. p. p. c?, 1822. 

 1. c. III, 373, 5. 



This species again is similar to ttie preceding ones. Male. Vertex 

 black above, the rest of it, the frons and the epistoma yellow pruinose; 

 above the antennæ a black tringle and epistoma with the mlddle 

 stripe, the mouth edge and the lower lateral parts black and shining. 

 Vertex with black, frons with yellow hairs, but the extent of the two 

 colours varying, sometimes the hairs mainly black; epistoma yellow- 

 haired. Occiput greyish pruinose below, yellow above and here nar- 

 rowly black just at the eye-margin; the hairs whitish below, yellow 

 above. Antennæ black or blackish brown, arista brownish yellow. 

 Thorax black, dull, with two stripes and the side margins yellow; it 

 is clothed with deep yellow hairs. Scutellum brownish or yellowish 

 brown, pale at the margin, the hairs extensively black, generally yel- 

 low only at the margin. Pleura yellowish pruinose with yellow hairs. 

 Abdomen with the second segment a little shorter than in the preceding 

 species and consequently abdomen a little shorter; it is black, dull, 

 only slightly shining at the hind margins of the segments; the seg- 

 ments have distinct orange hind margins, but on second segment 

 narrower than in hyhridus; second segment has a pair of large, yel- 

 low spots as in trivittatus, leaving a somewhat broader basal triangular 

 band, a middle stripe and a narrow hind margin black, the black 

 hind margin not reaching the sides; the spots on third segment as in 

 the other species, likewise with a protruding corner inwards covered 

 with a small, yellowish, somewhat pruinose spot; at the sides the 

 yellow spots are connected with the orange hind margin; the fourth 

 segment lias shallow, brownish yellow, somewhat pruinose lunules; 

 they are of quite another shape than in trivittatus, and narrower and 

 less near the front margin than in hyhridus and they are not con- 

 nected in the middle; the side margins of the segment are yellow. 

 Abdomen is yellow-haired, at the hind margins of the segments black- 



