186 Syrphidae. 



This species is easily i^nown already by its characteristic flat 

 epistoma. 



C. oeJutina is not rare in Denmark: at Copenhagen, Amager, 

 Ordrup Mose, Dyrehaven, Donse, Hillerød, Grib Skov, Faxe Ladeplads ; 

 on Lolland at Strandby and in Vester Ulslev Mose; on Langeland at 

 Lohals; in Jutland in Højenbæk Dal at Vejle, at Horsens, Marselisborg 

 at Aarhus and Haarup near Silkeborg, and on Bornholm at Rønne. 

 My dates are ^V? — ^^'k. It occurs on commons and meadows and is 

 a rather late occurring species. 



Geographical distribution:— Northern and middle Europe down 

 into Austria; towards the north to middle Sweden, as it according to 

 Becker was mixed vvith intonsa under Zetterstedt's fraterna; as 

 remarked under intonsa the species stood also in Stæger's collection 

 determined as fraterna probably by Zetterstedt : the species is further 

 recently recorded from Finland. 



29. C. mutabilis Fall. 



1817. Fall. Dipt. Suec. Syrph. 54, 10 {Eristalis). — 182^. Meig. Syst. 

 Beschr. Ul, 283, 10 (Srjrphus). — 1843. Zett. Dipt. Scand. Il, 802, 27 et 

 1859. XIII, 6019, 27 (Eristalis). — 1862. Schin. F. A. I, 283. — 1894. 

 Beck. Nov. Aet. Leop. Carol. Akad. LXII, 490, 124, Fig. 79. — 1901. Verr. 

 Brit. Fl. VIII, 252, 23. — 1902. Beck. Zeitschr. Hymn. Dipt. II, 351, 10. 



— 1907. Kat. palåarkt. Dipt. III, 33. — Syrphus funeralis Meig. 1822. 1. c. 

 III, 292,26. — C. funeralis 1902. Beck. Zeitschr. Hymn. Dipt. II, 353,26. 



— Syrphus pratensis Meig. 1822. 1. c. III, 293, 30. — C.pratensis 1902. 

 Beck. 1. c. 354, 30. — C. placida Meig. 1838 1. c. VII, 128, 40. — 1862. 



Schin. F. A. I, 288. — 1902. Beck. 1. c. II, 

 355, 40. — Eristalis pygmaea Zett. 1838. 

 Ins. Lapp. 614, 20 et 1843. Dipt. Scand. II, 

 796, 20 et 1849. VIII, 3171, 20 et 1859. 

 XIII, 6016, 20. 



Male. Rather narrow species. Eyes 

 with short, yellowish hairs. Frons slightly 

 arched and slightly pruinose, with a long- 

 itudinal groove ; vertex and frons black- 

 haired. Epistoma a little pruinose, only 

 slightly hollowed below the antennæ, the 

 central knob somewhat broad and some- 



Fig. 95. He-^^dof C. mutabilis^. ^"^^^ P^'"*^^' ^"^ ^^'^^t'^ prominent: 



between the knob and the mouth edge 

 the epistoma is hollowed, the lower part not prominent, a little des- 

 cending. Eye margins rather narrow, not pruinose, with short, white 

 hairs. Occiput narrowly grey pruinose at the eyes, the colour stopping 



