184 



Syrphidae. 



tensively so on abdomen; the pale-haired speciniens are greenish or 

 æneous while the dark-haired are bluish black ; the pale-haired females 

 have also generally the haus more erect both on thorax and abdomen. 

 — Of the foregoing species it bears resemblance to proxima, but this 

 species is larger, has paler and a little longer eye-hairs and the hind 

 metatarsi almost not thickened ; a good character is also that it has 

 the venter greyish pruinose, not shining as in vernalis. It is also 

 allied to cynocephala, but this is distinctly larger, has a more pro- 

 truding and descending epistoma and a little longer eye-hairs. 



C. vernalis is common in Denmark; at Copenhagen, Amager, 

 Utterslev Mose, Ordrup Mose, Ermelund, Dyrehaven, Lyngby Mose, at 

 Fure Sø, Søllerød, Hillerød, Tyvekrog, Nyraad near Vordingborg; on 

 Lolland at Bremersvold, in Egholm Skov and Dødemose west of Ny- 

 sted; on Langeland at Lohals; on Funen at Odense, and in Jutland 

 at Horsens, Holstebro, Thisted and Lønstrup. My dates are *^/5 — Vs). 

 It occurs on various flowers on fields and meadows and also in woods 

 during the whole summer. The pupa was taken by Mr. Schlick in 

 flood refuse in Utterslev Mose, the imago came in May. 



Geographical distribution: — All Europe, towards the north to 

 northern Sweden and in Finland, 



28. C. velutina Loew. 



1840. Loew, Programm Posen, 33, U, Fig. 44 el Isis 1840, 570, 11, 

 Fig. 44. — 1862. Schin. F. A. I, 288. — 1894. Beck. Nov. Aet. Leop. 

 Garol. Akad. LXIl, 486, 122, Fig. 80. — 1907. Kat. palaarkt. Dipt. 111, 40. 



— C. decidua Egg. 1860. Verh. zool. bot. Gesell. 

 Wien, X, 356. -- 1862. Schin. F. A. I, 275. 



— Erisfalis fraterna 1843. Zett. p. p. (nec 

 Meig.) Dipt. Scand. II. 798, 22 et 1849. VIII, 

 3172, 22 et 1859. XIII, 6017, 22. 



Male. Eyes with not long, yellowish or 

 pale brow^nish hairs. Frons more or less 

 pruinose, especially at the top and the sides, 

 with a longitudinal groove; frons black- 

 haired or v^ith yellow hairs above, vertex 

 yellow-haired with a few black hairs in 

 front. Epistoma distinctly grey pruinose, 

 of a characteristic flat shape; it is very 

 slightly hoUowed, almost straight from the 

 antennæ to the central knob, and this latter is thus slightly prominent, 

 but broad; between the knob and the not protruding mouth edge the 

 epistoma is very slightly hollowed, the lower part is not prominent 



Fig. 94. Head of C. velutina d". 



ti 



