300 Syrphidae. 



with only the coxæ blackish, and hind tarsi sometirnes slightly 

 brownish. 



Length 10— 12 mm. 



S. nitidicollis is not rare in Denmark, though it can scarcely be 

 termed common ; Frederiksberg Have, Amager, Ordrup Mose, Dyre- 

 haven, Lyngby Mose, Søllerød, Tyvekrog, Nordskoven at Jægerspris, 

 at Sorø; on Lolland in Kældskov; in Jutland at Horsens, Funder near 

 Silkeborg and Frederikshavn. My dates are ^^/s — ^^h. It oceurs in 

 woods and on iields on various flowers and is especially found in 

 spring. 



Geographical distribution:— Northern and middle Europe and 

 recorded dov^'n into Italy ; towards the north to northern Sweden, 

 and in Finland. 



15. S. nitens Zett. 



1843. Zett. Dipt. Scand. II, 712, U et 1849. VIII, 3137, 14 {Scaeva). 

 — 1901. Verr. Brit. Fl. VIII, 377, 17, figs. 295—296. — 1907. Kat. palåarkt. 

 Dipt. 111, 68. 



Male. Vertex elongated triangular, as long or scarcely as long as 

 the eye-suture, blackish; frons either quite yellow or with two black 

 spots above the antennæ, or these spots connected to a lunule; epi- 

 stoma yellow, mouth edge more or less black and likewise the lower 

 lateral parts, and sometirnes an abbreviated middle stripe black; jowls 

 blackish. Vertex, frons and epistoma black-haired, or the latter more 

 or less to almost quite yellovv-haired. Occiput whitish grey pruinose, 

 with white, upwards yellow hairs; above a row a black hairs over- 

 hanging the eyes. Eyes bare. Antennæ reddish, third joint more or 

 less dark or blackish above, it is elongated oval, longer than the two 

 basal joints together; arista not so long as the antennæ, inserted 

 rather long from the base. Thorax blackish or bluish æneous, shining; 

 it is slightly yellowish above the wing-root and on the postalar 

 calli; it is clothed with yellow or reddish yellow hairs, longest and 

 densest at the sides. Scutellum yellow, black-haired, with more or 

 fewer yellow hairs round the margin. Pleura with long, yellow hairs. 

 Abdomen flat, ovate, with somewhat marked side margins; it is dull 

 black, a little shining at the hind margins of the segments and more 

 at the apex; it has a basal pair of yellow spots and two bands; the 

 basal spots lie on the middle of the segment, they are triangular, 

 sloping forwards at the sides and here going narrowly over the margin; 

 the band on the third segment is well away from the front margin, 

 it is much undulated as its fore margin is curved in at each side and 

 emarginate in the middle, while the hind margin is strongly emarginate 



