166 Syrphidae. 



the outer half, and with a dividing longitudinal line above and below. 

 The length is about 9 mm. 



Remarks: Becker has slated (Zeitschr. Hymn. Dipt. II, 1902, 351) 



E. flavicornis Fabr. = »S. fiavicornis Meig. = S. chloris Meig, ; a speci- 

 men in the collection of Sehestedt and Tønder Lund labelled flavi- 

 cornis, and no doubt determined by Fabricius (but not type), is like- 

 wise chloris, and this confirms the statements given by Becker. It is 

 tlius incorrect when flavicornis Meig. in the Kat. palåarkt. Dipt. is 

 placed as synonym to Langhofferi Beck. — I agree with Becker and 

 Verrall in considering it the most advisable to keep the name chloris. 



C. chloris is common in Denmark; Charlottenlund, Ordrup Mose, 

 Ermelund, Dyrehaven, Lyngby Mose, Ryget Skov at Farum Sø and 

 Bagsvær; on Lolland at Strandby, in Kældskov and Dødemose west 

 of Nysted; in Jutland at Horsens. It is a spring species, my dates 

 are ^^4 — ^V^? the latter date unusually late. It occurs in fens and on 

 meadows on various spring flowers, especially Caltha and Taraxacum. 



Geographical distribution: — Northern and middle Europe dow^n 

 into France and probably to Italy; towards the north to middle Sweden, 

 and in Finland. 



19. C. fraterna Meig. 



1830. Meig. Syst. Beschr. VI, 352, 97. (Sijrphus). — 1862. Schin. 



F. A. I, 285. — 1894. Beck. Nov. Aet. Leop. Garol. Akad. LXII, 244. — 

 1901. Verr. Brit. Fl. VIII, 248, 20, fig. 227. — 1902. Beck. Zeitschr. Hymn. 

 Dypt. II, 355, 97. — 1907. Kat. palåarkt. Dipt. 111, 27. — Eristalis dimidiata 

 Zett. 1849. Dipt. Scand. VIII, 3168, 17—18. — C. dimidiata 1894. Beck. 

 I. c. LXII, 422, 74, Fig. 64. — C. rufitiUa Egg. 1860. Verh. zool. bot. Gesell. 

 Wien, X, 349. — 1862. Schin. F. A. I, 288, nota. — C. chloris 1870. 

 Verr. (nec Meig.) Ent. Month. Mag. VI, 205. — 1885. Kow. Wien. ent. 

 Zeitg. IV, 205. 



Male. Eyes with short, dark hairs, disappearing at the lower end 

 of the eye. Frons pruinose at the sides, with a longitudinal groove; 

 vertex and frons black-haired. Epistoma a little pruinose, most below 

 the antennæ and here at each side with a distinct. triangular, greyish 

 or whitish spot; it is rather much hoUowed below the antennæ, the 

 central knob not large but prominent; between the knob and the 

 mouth edge the epistoma a little hoUowed, the lower part somewhat 

 protruding and a little descending. Eye-margins of medium breadth, 

 not pruinose, punctate, with short, yellowish hairs. Occiput greyish 

 pruinose, this colour stopping below the eye; the hairs yellow, above 

 besides a few long, black hairs. Antennæ small, brownish red, third 

 joint roundish ; arista not long, apparently bare. Thorax æneous black 

 or posteriorly more bluish black, shining, densely and not quite finely 



