160 Syrphidae. 



duUish 011 second and third segments; it is clothed with somewhat 

 long, erect, yellow hairs, shortest on the middle ; the hairs at the hind 

 margins of the segments more or less decumbent, thus forming more 

 or less conspicuous fringes, generally most conspicuous on third seg- 

 ment. Venter æneous black, shining, with long, pale hairs. Legs with 

 the femora black with yellow apex, tibiæ yellow, generally with more 

 or less distinct blaekish rings; tarsi yellow. The legs not specially 

 long-haired and almost quite pale-haired, only behind the anterior 

 femora towards apex sometimes some black hairs; hind femora setulose 

 beneath, the bristles black in the apical half; the black spinulation 

 below middle tarsi conspicuous; hind metatarsi not thickened. Wings 

 a little yellowish towards the anterior margin; the upper angle at 

 the upper marginal cross-vein a little acute or almost rectangular. 

 Squamulæ whitish with yellow margin and fringe. Balteres whitish 

 with the knob darkened. 



Female. Frons not broad, widening downwards, trisulcate, the 

 middle channel inconspicuous; at the sides towards the eyes the frons 

 is yellow pruinose, and it is yellow-haired, at the ocelli with some 

 black hairs. Antennæ generally a little paler than in the male, and 

 with the third joint somewhat larger. Thorax and abdomen haired 

 as in the male, but the hairs shorter, the hindmarginal fringes still 

 more conspicuous. Tibiæ quite yellow; hind femora not setulose 

 beneath, only with some short, black bristles towards the apex. Halteres 

 whitish yellow. 



Length 10,5—13 mm. 



C. canicularis is rare or at all events very local in Denmark and 

 has only been taken in the southern Jutland in Greisdal at Vejle (H. 

 J. Hansen, the author) and at Horsens (O. G. Jensen). The dates are 

 in August. It was for the first time taken in 1878. I have taken it 

 on flowers of Garduus and other Gompositæ and on Umbelliferæ. — 

 The variety with bare arista and no hindmarginal fringes on abdomen 

 does not occur in Denmark. 



Geographical distribution: — Europe down into Italy; it seems to 

 have its northern limit in Denmark and is not knovvn from England; 

 if C rufitarsis Zett. (XII, 4665, 17 — 18) is identical with canicularis 

 as considered by Strobl (Mitth. Ver. Steierm. 1893, XXIX, 176 and 

 1898, XXXIV, 225), and as seems to me rather probable, the species 

 goes to the southern Sweden, but is rare. 



16. C. grossa Fall. 



1817. Fall. Dipt. Suec. Syrph. 53, 7 (Eristalis). — 1822. Meig. Syst. Beschr. 

 III, 281, 5 (Syrphus). — 1843. Zett. Dipt. Scand. II, 781, 5 et 1849. VIII, 



