Ghilosia. 163 



Brit. FL VIII. 239, 16. - 1902. Beck. Zeitschr. Hymn. Dipt. 11, 355,8.— 

 1907. Kat. palåarkt. Dipt. III, 21. — Eristalis flavipes Zett. (nec Panz.) 1838. 

 Ins. Lapp. 611, 5 et 1843. Dipt. Scand. II, 784, 9 et 1849. VIII, 3167, 9. 

 — C. flavicornis Schin. (nec Fabr.) 1862. F. A. I, 285. 



Male. Eyes with dense, soinewhat long, brown hairs. Frons some- 

 what large, slightly pruinose towards the sides, with a broad, long- 

 itudinal groove ; vertex and frons yellow-haired, just above the antennæ 

 may be some black hairs. Epistoma only pruinose below the antennæ, 

 for the rest shining; it is slightly hollowed below the antennæ, nearly 

 straight from the antennal prominence to 

 the central knob, this latter small, little 

 prominent and lying somewhat long down- 

 wards; between the knob and the pro- 

 minent mouth edge the epistoma is hol- 

 lowed, its lower part is moderately pro- 

 minent and somewhat descending. Eye- 

 margins broad, almost not pruinose, with 

 shortish, yellowish hairs. Occiput grey 

 pruinose, this colour stopping below the 

 eye ; the hairs all yellow, or whitish below. 

 Antennæ somewhat large, orange, third 

 joint a little longer than broad; arista pjg §1. Heixå of C. albipila d. 

 apparently bare. Thorax æneous olive, 



shining, very fmely punctate; it is densely clothed with somewhat 

 long, erect, yellow hairs. There are no bristles. Pleura with long, 

 yellow hairs. Abdomen æneous black or more olive, often with slight 

 bluish or purplish reflexes, somewhat dull on second and third seg- 

 ments ; it is clothed with long, erect, yellow hairs, shortest along the 

 middle. Venter blackish, somewhat pruinose, with long, pale hairs. 

 Legs with femora black with yellow apex, tibiæ yellow, the anterior 

 may be slightly darkened in the middle; anterior tarsi yellowish with 

 the last or two last joints blackish, front metatarsi blackish above and 

 also middle metatarsi slightly so ; hind tarsi blackish, the middle joints 

 more or less obscurely reddish. The hairs on the legs yellowish, but 

 more or less black behind the apical half of front femora, and below 

 the apex of posterior femora are some black hairs ; hind femora densely 

 but somewhat fmely setulose beneath, the bristles yellow at the base 

 but mixed with black outwards, and towards the apex almost quite 

 black. Hind metatarsi almost not thickened. Wings yellow tinged, 

 especially at the base and anterior margin ; upper marginal cross-vein 

 curved above, the upper angle rectangular. Squamulæ whitish with 

 margin and fringe yellow. Halteres yellow with blackish knob. 



11* 



