Eumerus. '531 



with a blackish cross-band above the middle and generally a very 

 narrow, black middle line, slightly vvidening above the antennæ; the 

 hairs pale. Antennæ larger than in the male; third joint generally 

 more brown. Abdomen with the spots smaller, less defmed and more 

 whitish pruinose, the spots on third segment more transverse as only 

 their front part is pale, the hind part black and shining. Anterior legs 

 generally paler. 



Length 7,5 — 9 mm. 



S.pipiens is very common in Denmark all over the country; it 

 occurs on nearly all localities, also in gardens, and it frequents many 

 various flowers; the male is a fine and indefatigable hoverer, one of 

 the best of all Syrphids. My dates are '/s — ^^/lo; I have taken it in 

 copula on ^^/s. The pupa was taken in Damhusmosen in heaps of 

 leaves and other vegetable matters in August (Schlick). 



Geographical distribution:— Very widely distributed and common; 

 all Europe, in parts of Asia and down to South Africa and on the 

 Ganaries and Madeira; towards the north to northern Sweden and in 

 Finland; it is also common in North America. 



42. CumePUS Meig. 



Species of somewhat small or medium size; the colours are black 

 or æneous, abdomen in many species more or less reddish, and it 

 has three pairs of more or less distinct, whitish pruinose, shallow 

 lunules or oblique bands. Head not short or somewhat long, semi- 

 globular, sometimes rather flattened above; it is broader than high 

 and broader than thorax, a little excavated behind. Eyes some- 

 what large, in the male either only approximated in a point or 

 touching for a shorter or longer to rather long distance, in the 

 female separated; they are apparently bare or more or less to 

 densely hairy; in the male the facets on the front part, towards the 

 suture, are more or less, from slightly to rather strongly enlarged. 

 Vertex long; the occiput puffed out above; frons not prominent, some- 

 what small to very small, haired. Antennæ inserted in or a little 

 below the middle, in the male of ornatus considerably below ; they are 

 smaller or larger, third joint sometimes rather large, a little elongated 

 or nearly square as it is generally more or less truncate in front; it 

 is larger in the female than in the male; sometimes the second joint 

 elongated {longicornis, non-Danish) ; arista is inserted near the base or 

 at some distance from it, more or less near the upper front corner, 

 it has generally the basal joints distinctly visible; the basal antennal 

 joints have small hairs, and bristles at the apex, longest below, third 



34* 



