172 



Syrphidae. 



Length 9 to nearly 1 1 mm. 



Remarks : Becker describes the thoracai pubescence of the female 

 as having the short hairs partly and the long hairs all black ; in my 

 specimens the pubescence is nearly all yellow with only few of the 

 long hairs black. 



C. gigantea is rare in Denmark, I only know two specimens, both 

 females, one from Ordrup Mose ^^U> 1844 (Stæger) and one from 

 Laurberg near Randers in Jutland 22/5 jgjo (Esben Petersen). 



Geographical distribution: — Northern and middle Europe down 

 into Bohemia, and also recorded from Italy; towards the north to 

 northern Sweden, and in Finland. 



22. C. proxima Zett. 



1843. Zett. Dipt. Scand. II. 792, 17 (Eristalis). — 1862. Schin. F. A. 1, 

 282, 12. — 1894. Beck. Nov. Aet. Leop. Garol. Akad. LXII, 432, 80, 

 Fig. 71—72. — 1901. Verr. Brit. Fl. VIII, 265, 25. ~ 1907. Kat. palåarkt. 

 Dipt. III, 36. — C. modesta Egg. 1860. Verh. zool. bot. Gesell. Wien, X, 

 354. — 1862. Schin. F. A. I, 287. 



Male. Eyes with longish, yellowish, above more pale brownish 

 hairs. Frons broadly grey dusted at the sides, with a longitudinal 

 groove; vertex and frons black-haired. Epistoma pruinose below the 

 antennæ, for the rest very slightly pruinose, shining; it is hollowed 



below the antennæ, the central knob some- 

 what broad and prominent; between the 

 knob and the upper mouth edge the epis- 

 toma is hollowed, the lower part not pro- 

 minent, and it is very slightly descending. 

 Eye-margins of medium breadth, pruinose, 

 with white hairs. Occiput grey pruinose, 

 the hairs white below, black above and 

 here long, but behind the vertex may be 

 yellow hairs. Antennæ small, black or 

 blackish brown.third joint squarely roundish ; 

 arista short, distinctly pubescent. Thorax 

 æneous or dark greenish black, shining, 

 finely punctate; it is densely clothed with 

 somewhat long, erect, yellow or brownish yellow hairs, more or less 

 mixed with black, until becoming almost quite black-haired; on scutellum 

 the hairs longer, but besides there are shorter hairs. There are noto- 

 pleural, supraalar and postalar bristles, the .supraalar very short, the 

 postalar strongest, but the bristles not conspicuous; scutellum has 

 numerous, somewhat long, but fine marginal bristles. Pleura with 



Fig. 86. Head of 

 C. proxima c?. 



