Ghilosia. 133 



pale hairs. Legs black, knees very narrowly reddish ; the longer hairs 

 on the anterior femora pale, and the short hairs on the hind femora 

 yellow on the basal part; for the rest the pubescence chiefly black; 

 hind femora not spinulose beneath, only the black hairs towards the 

 apex distinct; hind metatarsus not thickened. Wings a little tinged, 

 most towards the base; the upper angle at the iipper marginal cross- 

 vein somewhat acute. Squamulæ pale yellow, with a white fringe. 

 Balteres yellowish brown. 



Female. Vertex somewhat narrow, but the frons rapidly vvidening 

 downwards; above the antennæ a similar triangle as in the male; 

 frons and vertex all yellow-haired. Thorax with shorter, more depressed 

 hairs, and the postalar calli rather orange. Abdomen with the grey 

 spots less defined and the black parts not dull. 



Length 7,-5— 8,5 mm, 



C. maculata is rare in Denmark, or at all events very local ; it has 

 only been taken on Falster at Fiesle (H. J. Hansen, Schlick), on Lol- 

 land at Maribo, Bremersvold and near Nysted (L. Jørgensen) and, 

 according to a communication, in Jutland in Hansted Skov at Horsens 

 (A. Petersen); it was for the first time taken in J88L The dates are 

 ^■^/s — ^^/g. The reason of its being so local is, that it is exclusively 

 associated with AUium ursinum, which is well known; generally only 

 males are taken, the females being very rare. Mr. L. Jørgensen gave 

 me some interesting Communications about it; he says, that the species 

 is more slow than the other species of the genus, they fly low among 

 the piants of Allium, as also Verrall records (1. c. 679), and they fly 

 only short, from leaf to leaf; when the females are taken so rarely, 

 it is, says Jørgensen, because they occur still lower among the piants 

 than the males; when he worked with the net quite down to the 

 ground, he also got females. — The developmental stages of the 

 species are not known, I think the biology of the larva will prove to 

 be similar to that of C. fasciata, the larva of which lives in the leaves 

 of Allium ursinum (see under the description of the genus). 



Geographical distribution: — Northern and middle Europe down 

 into Switzerland ; towards the north to northern Sweden. 



2. C. antiqua Meig. 



1822. Meig. Syst. Beschr. HI, 291, 24 (Syrphus). — 1902. Beck. Zeitschr. 

 Hymn. Dipt. H, 353, 24. — 1907. Kat. palåarkt. Dipt. IH, 23. — C. sparsa 

 Loew, 1857. Verh. zool. bot. Geseli. Wien, VII, 604, 20. — 1862. Schin. 

 F. A. I, 278. — 1894. Beck. Nov. Aet. Leop. Carol. Akad. LXII, 339, 8, 

 Fig. 139. - 1901. Verr. Brit. Fl. VHI, 214, 2. 



