Syrphus. 279 



Maribo and in Vester Ulslev Mose; on Fæjø; on Langeland at Lohals, 

 and in Jutland at Hald near Viborg. My dates are V« — ^^h. All the 

 specimens from gardens are of the var. confusus, but the same is the 

 case with some of the others; generally my specimens taken late in 

 the year belong to confusus. The larva was taken by Mr. Schlick in 

 Dyrehaven on ^"/i under old leaves on the ground, the imago came 

 on ^73; he has also bred several specimens from pupæ, but they are 

 without locality. Zeller (Isis 1842, 828) mentions the larva as common 

 on the stems of Betula in November; they were of various size; one 

 pupated and developed in March the foUowing year; I possess also 

 several larvæ taken on Betula at the end of September at Hillerød 

 by Mr. Kryger, but as the larva is quite similar to that of veniistus I 

 cannot say to which of these species the mentioned larvæ belong. I 

 think Zeller and Verrall are correct in suggesting that the species has 

 two broods in the year. 



Geographical distribution: — All Europe dovvn into Spain and 

 Italy; towards the north to northern Sweden, and in Finland. 



2. S. tricinctus Fall. 



1817. Fall. Dipt. Suec. Syrph. 41, 9 {Scaeva). — 1822. Meig. Syst. 

 Beschr. III, 310, 53. ~ 1843. Zett. Dipt. Scand. II, 724, 27 et 1849. VIII, 

 3140, 27 et 1855. XII, 4657, 27 et 1859. XIII, 5095, 27 {Scaeva). — 

 1862. Schin. F. A. I, 303. — 1901. Verr. Brit. Fl. VIII, 346, 2, figs. 285— 

 286. — 1907. Kat. palåarkt. Dipt. III, 71. 



Male. Frons black, a litlle pruinose, especially towards the eyes; 

 epistoma yellow, somewhat shining, with a broad, black middle stripe, 

 reaching near to the antennæ; the mouth edge and lower hind corners 

 of epistoma black; jowls blackish, sometimes paler. Vertex and frons 

 black-haired, the former with yellow hairs behind; epistoma yellow- 

 haired, but down the sides and generally also just at the central knob 

 are black hairs. Occiput grey pruinose, with white, above yellowish 

 hairs, and here generally also some black hairs overhanging the eyes. 

 Eyes densely pale-hairy with somewhat short hairs. Antennæ black, 

 somewhat long; arista about of the length of the antennæ. Thorax 

 dark æneous, in front of scutellum often bluish, shining; it is clothed 

 with yellow hairs. Scutellum yellowish or brownish, pellucid, some- 

 times with a little bluish tint; it has black, at the base more or less 

 yellow hairs. Pleura with yellow hairs. Abdomen dull black, a little 

 shining towards the apex; on the second segment it has a pair of 

 isolated, small, transverse, yellow spots, sometimes very small or quite 

 wanting; on the third segment there is a broad band at the front 

 margin, more or less incised behind in the middle, but generally deeply ; 



