572 Syrphidae. 



at Maribo, Strandby, Bremersvold and in Kældskov; on Langeland at 

 Lohals; on Funen at Assens; in Jutland at Horsens and Frijsenborg. 

 My dates are ^^/s— ^Vt. It occurs in and at woods and on fields, 

 frequenting various flowers. 



Geographical distribution: — Europe down into Italy, and on 

 Madeira; it is not known from Scandinavia but it occurs in England, 

 and is recorded from Siberia. 



2. C. arcuatum L. 



1758. Linn. Syst. Nat. X, 592 et 1767. XII, 2, 985, 39 et 1761. Fn. 

 Suec. 1806 (Musca). — 1841. Loew, Stett. ent. Zeitg. II, 159, 3 et 1856. 

 Verh. zool. bot. Geseli. Wien, VI, 609,4. — 1862. Schin. F. A. I, 253. — 

 1901. Verr. Brit. Fl. VIII, 645, 2, figs. 443—444. — 1907. Kat. palaarkt. 

 Dipt. III, 145. — C. fasciolatum Meig. (nec De G.) 1822. Syst. Beschr. III, 

 170, 4. — 1843. Zett. Dipt. Scand. II, 634, 2 et 1849. VIII, 3108, 2 et 

 1852. XI, 4300, 2 et 1859. XIII, 5074, 2. — C. hortense Meig. 1822. 1. c. 

 III, 173,8. 



Male. This species is very similar to cautum; the eyes are more 

 densely and longer haired, and the hairs are brown; epistoma with a 

 broader black middle stripe and with some black hairs above at the 

 sides of the antennæ; occiput all black-haired above. Antennæ with 



Fig. 194. Antenna of C. arcuatum cS, from the inside. X 40. 



the third joint a little longer than the two basal joints together, the 

 second (on the inside) almost not longer than the first. Thorax with 

 the greyish stripes abbreviated behind the middle, but there is no 

 greyish space in front of scutellum ; the yellow spots on the sides 

 reaching near to each other; thorax and scutellum darker haired than 

 in cautum, the hairs nearly all blackish. Pleura black-haired above 

 and behind. Abdomen more short ovate, more arched and more 

 pointed than in cautum, with the fifth segment much smaller and 

 curved evenly downwards; abdomen is marked in the same way but 

 the yellow bows are more narrow, more curved and almost not 



