458 Syrphidae. 



only of the cross-vein. Squamulæ with their fringes and the balteres 

 yellow. 



Female. Vertex and frons broad, slightly and evenly widening 

 downwards; they are yellow pruinose, upwards more brownish or 

 dark greyish; the hairs are black. Behind the eyes a row of black 

 hairs as in the male. Abdominal spots mainly as in the male, the 

 side spots on second and third segments a little narrower, the black 

 spots on fourth segment larger so that the segment is in reality black 

 with greyish or yellow lunules and a large triangle at the hind margin, 

 often the triangle touching the inner ends of the lunules; fifth segment 

 greyish or yellow pruinose with an abbreviated triangular black middle 

 line in front. Hind femora without tubercle. 



Length 8,5 — 10 mm. 



H. frutetorum is not rare in Denmark but much less common 

 ihan pend illus; Ordrup Mose, Dyrehaven, Lyngby Mose, Ørholm, Birke- 

 rød, Nøddebo; on Lolland at Maribo, in Merrits Skov, Alsø Skov, 

 Kældskov and Egholm Skov. My dates are ^^/s — ^^/t, it is thus a some- 

 what early species. It occurs in fens and at waters and frequents 

 especially Umbelliferæ. 



Geographical distribution: — All Europe; towards the north to 

 middle Sweden, and in Finland. 



6. H. versicolor Fabr. 



1794. Fabr. Ent. Syst. IV, 283, 19 (Syrphus) et 1805. Sysl. Antl. 233, 8 

 (Eristalis). — 1862. Schin. F. A. I, 341. — 1901. Verr. Brit. Fl. VIII, 537, 5, 

 fig. 568—571. — 1907. Kat. palåarkt. Dipt. III, 111. — 1910. Beck. Berl. 

 ent. Zeitschr. LV, 228. 



This species is very similar to frutetorum. Male. Head and shape 

 of epistoma like in frutetorum, the epistoma slightly more hollowed 

 below the antennæ; the vertex just narrowing a little down to the 

 narrow est point; there are no black hairs at the upper ey e-margin. 

 Abdomen with the grey lunule on first segment more or less distinctly 

 divided in the middle, but generally only slightly and sometimes not; 

 the spots on abdomen otherwise nearly as in frutetorum, but those 

 on second and third segments longer at the sides so that they are on 

 second segment broadly, on third segment more narrowly connected 

 with the orange hind margin, the black, transverse band in front of 

 the hind margin thus not reaching the sides and the spots on second 

 and third segments connected with each other; on the side margins 

 there is a small black spot near the hindj.corners on both segments, 

 stretching more or less forwards. The terminal appendages of the 

 genitalia are likewise somewhat claw-shaped, but they are much 



