358 Syrphidae. 



tarsi more or less dark brown. The legs short-haired, the hairs yel- 

 low except generally a row behind the middle femora, and the hairs 

 at the apical part of hind femora and all on hind tibiæ, which are 

 black. Wings a little brownish tinged and rather so at the front 

 margin; stigma blackish brown and below it a blackish spot, seaming 

 the radial vein to the base of the cubital vein. Squamulæ with the 

 fringes, and plumula blackish brown. Balteres yellow with the peduncle 

 brown. 



Female. Vertex narrow, black ; frons increasing in breadth down- 

 wards, yellow with a black middle stripe from vertex to antennæ, 

 likewise widening downwards. The hairs black and short on the 

 middle stripe, for the rest mainly yellow and longer. Antennæ larger 

 than in the male. The hairs on thorax and scutellum quite short. 

 The abdominal bands a little narrower. 



Length 10,5—12 mm. 



X. ornatuw is somewhat rare in Denmark; Amager, Ermelund, 

 Dyrehaven, Ruderhegn. Faxe Ladeplads; on Lolland at Maribo, 

 Christianssæde and in Kældskov; on Langeland at Lohals. My dates 

 are '^/t— ^''/s. It occurs on flowers on meadows. The larva was taken 

 in Piuderhegn, sitting on Ononis procurrens, in September; it pupated 

 the next spring on ^•''/s and developed on ^^/4 (Kryger). 



Geographical distribution: — Europe down into Spain and Italy; 

 towards the north to middle Sweden, and in Finland. 



2. X. citrofasciatum De Geer. 



1776. De Geer. Mém. Ins. VI, 118, 9 (Musca). — 1862. Schin. F. A. 

 I, 319. — 1901. Verr. Brit. FI. VIII, 450, 2, fig. 319. — 1907. Kat. palåarkt. 

 Dipt. III, 78. — Syrphus festivus Fabr. (nec L.) 1775. Syst. Entom. 769, 34 

 et 1805. Syst. Antl. 242, 46 (Eristalis). — 1817. Fall. Dipt. Suec. Syrph. 

 38,3 p.p. (Scaeva). — 1822. Meig. Syst. Beschr. III, 297,36 {Syrphus) et 

 1838. VII, 130, 2 {Doros). — 1843. Zett. Dipt. Scand. II, 692, 2 {Doros). 



This species is very similar to ornatum. Male. Epistoma a little 

 less decreasing in breadth downwards; frons and epistoma more 

 black-haired. Thorax more short-haired, and the hairs more decum- 

 bent. Scutellum with the dark basal part broader, so that only a 

 smaller or larger tip is yellow; the basal part is brownish or some- 

 times yellowish, with only the basal corners black. There is always 

 a distinct yellow spot also on metapleura. Abdomen more regularly 

 ovate; the basal spots forming narrow bands, about three times as 

 broad as long at the side; the foUowing bands a little narrower than 

 in ornatum and a little less arched, the second and third straight; the 

 hairs at the base of the side margin shorter. Legs quite yellow, ex- 



