494 Syrphidae. 



two faint and indefinite, dark clouds, one as a fascia across the base 

 of the cubital vein and one about the apical part of the cubital cell 

 and down the medial cross-vein. Squamulæ brownish or blackish 

 with a dark yellow fringe. Balteres brownish yellow. 



Fig. 169. Wing of C. berberina d". 



Female. Quite similar to the male; vertex and frons moderately 

 broad, widening downwards; they are yellow pruinose, with a black 

 middle line from the ocelli to the antennæ and here widening to a 

 spot; the hairs yellow but more or less black at the ocelli and above 

 the antennæ. The two last, pale-haired abdominal segments often 

 somewhat yellow pruinose, especially on a transverse middle band. 



Length. The species may vary rather much in size, the length 

 from 8 — 13 mm. 



Remarks: This species is always described as having the thorax 

 more or less pale-haired, at all events on the anterior part, but I 

 possess several specimens with thorax all black-haired. 



C. berberina is not rare in Denmark, though it can scarcely be 

 termed common; Ordrup Mose, Bøllemosen, Fuglevad, Hillerød, Tyve- 

 krog, Tisvilde, at Sorø and at Tjustrup Sø; on Falster; on Lolland 

 in Kældskov and at Bremersvold; on Langeland at Lohals, and in 

 Jutland at Horsens. My dates are ^^lo—^h. It occurs in woods and 

 thickets and in spring it is often seen on the flowers of Grataegus 

 oxyacantha. The pupa was taken at Bøllemosen under moss on a 

 tree-stub on ^^U, it developed on ^Is (Schlick). 



Geographical distribution:— Europe down intoltaly; its northern 

 limit is in Denmark, and it occurs in England. 



2. C. oxyacanthae Meig. 



1822. Meig. Syst. Beschr. III, 237, 12 (Milesia). — 1862. Schin. F. A. I, 

 351. — 1901. Verr. Brit. Fl. VIII, 581, 3. — 1907. Kat. palåarkt. Dipt. III, 

 124. — C. BreUssonii Macq. 1827. Soc. Se. Lille 328, 6 et 1834. Suit. a 

 Buff. I, 498, 6. - 1838. Meig. 1. c. VII, 171, 16. 



