182 



Syrphidae. 



LXII, 457, 99, Fig. 35. — 1901. Verr. Brit. Fl. VIII, 254, 24. — 1907. Kat. 

 paliiarkt. Dipt. III. 40. — Syrphus pallidicornis Meig. Syst. Beschr. III, 294, 

 31. _ Eristalis pallidicornis 1843. Zett. 1. c. II, 800, 24 et 1849. VIII, 

 3172,24. — C. pallidicornis 1902. Beck. Zeitschr. Hymn. Dipt. II, 354,31. 

 — C.luctuosa Meig. 1838. 1. c. VII, 125, 16. — 1902. Beck. Zeitschr. Hymn. 

 Dipt. II, 355, 16. — C. nitida Meig. 1838. I. c. VII, 126, 17. — 1902. Beck. 

 ]. c. Il, 355, 17. — C. ohsciira Loew, 1840. Programm Posen, 33, 10 et 

 Isis 1840. 570, 10. 



Male. Eyes with somewhat short, dark brownish to biackish 

 pubescence, generally paler quite below; the hairs have generally a 

 somewhat strong appearance. Frons not pruinose, with a longitudinal 

 groove; vertex with black and yellow hairs, frons black-haired. Epis- 

 toma a little pruinose below the antennæ, for the rest shining; it is 



somewhat hollowed below the antennæ, the 

 central knob distinctly prominent and to- 

 gether with the low^er part rather protruding; 

 between the knob and the mouth edge the 

 epistoma is only a little hollowed, and it is 

 slightly descending. Eye-margins of medium 

 breadth; they are not pruinose but have 

 short, pale hairs. Occiput grey pruinose, the 

 colour stopping below the eye; the hairs 

 yellowish, some of the long hairs above black. 

 Antennæ not large, third joint somewhat 

 roundish, biackish brown to reddish: arista 

 short-pubescent. Thorax greenish or æneous 

 black, sometimes bluish black, densely, some- 

 w^hat finely punctate, shining; it is clothed with longish, erect, yellow^ 

 hairs which may be more or less mixed with black, especially towards 

 the sides, and in rare cases they may be all black; on the posterior 

 part and scutellum are besides short, black hairs; there are rather 

 short and inconspicuous notopleural, supraalar and postalar bristles; 

 the scutellar marginal bristles distinct but not long. Pleura with 

 longish, yellow hairs, more or less mixed with black. Abdomen 

 æneous or sometimes bluish black, second and third segments almost 

 quite duU, fourth segment shining; the pubescence is erect, somewhat 

 long and yellow, but shorter and black along the m id die, the hairs 

 may also be more or less black at the hind margin of the third and 

 on almost all the fourth segment, so that the hairs at the sides are 

 black at the hind corners of third and fourth segments, or along the 

 whole side of the fourth segment. Venter shining, with long, pale 

 hairs, short on third and fourth segments. Legs with femora black 

 with just the apex yellow, tibiæ yellow with a broad, black ring 



Fig. 92. Head of 

 G. vernalis d- 



