Crioirhina. 495 



Male. This species is quite similar to berberina except in the 

 colour of the pile; the head is of the same shape but the hairs on 

 vertex all yellow and on epistoma pale yellow, and the hairs on 

 occiput whitish below, yellow above. Antennæ a little paler. Thorax 

 and scutellum all clothed with long, dense pile, varying from dark 

 yellow to pale yellow, and the hairs on pleura all yellow. Abdomen 

 as in berberina but the hairs all yellow to pale yellow, generally 

 darkest at the base. Legs coloured quite as in berberhui but the hairs 

 more or less pale behind at the base of the anterior femora and also 

 partly on the anterior side of the middle fernora. Wings, squamulsa 

 and balteres as in berberina. 



Female. Quite similar to the male, and differing in the same 

 way from the female of berberina. Vertex and frons with the hairs 

 all pale. Abdomen somewhat greyish pruinose and third and fourth 

 segments generally with a more or less distinct, yellowlsh pruinose,. 

 transverse band. 



Length 8 — 13 mm. 



C. oxyacanthæ is like the preceding not properly common in Den- 

 mark, and it occurs in the same way; Ordrup Mose, Bagsvær, Frederiks- 

 dal, Ruderhegn, Søllerød, Tisvilde, Bognæs near Roskilde and at Sorø; 

 on Falster, and in Jutland at Vejle, Horsens, Haarup near Horsens 

 and Frijsenborg. My dates are '^^/o— ^^/t. 



Geographical distribution:— Europe down intoltaly; its northern 

 limit is in Denmark, and it occurs in England; it is also recorded 

 from Japan. 



Remarks: It has been suggested by Gerståcker (Bericht. Gebiet. 

 Entom. fiir 1861, 1863, 201) that C. berberina and oxyacanthae are 

 only colour variations of one species, and he speaks of intermediate 

 forms; Portschinsky (Trudy Russk. Entom. X, 1877, 187) is of the 

 same opinion; I have never seen such intermediate specimens, and I 

 think it best at present to keep both species. Verrall notes that 

 berberifia occurs in Scandinavia but oxyacanthae not, but this is an error 

 evidently caused by Zetterstedt's recording berberina, but he records it 

 only from Denmark, where both species occur, but Zetterstedt had 

 not seen oxyacanthae. 



3. C. floccosa Meig. 



1822. Meig. Syst. Beschr. III, 238, 13 (Mllesia). — 1862. Schin. F. A. 

 I, 351. - 1901. Verr. Brit. FL VIII, 583, 4, fig. 403. — 1907. Kat. palåarkt. 

 Dipt. III, 124. — Syrphus regulus Fall. 1826. Dipt. Suec. Suppl. 9. — 

 C.regula 1843. Zett. Dipt. Scand. II, 672, 1. 



L 



