Gould, B. of Europe, pi. 118 (1837). Type, Erithacus calliope.
This genus is very doubtfully separable from Cyanosylvia and like that genus the males have brilliantly coloured throats, only scarlet instead of: blue, whilst the females are plain-coloured. The first primary is comparatively long, and the tarsus is also long and suited for the birds' terrestrial Habits. All the species are migratory.
Key to Species.
A. No white on the tail-feathers C. calliope, p. 91.
B. Base or tip of tail, or both, white.
a. Sides of cheeks black C. pectoralis, p. 92.
b. A broad white moustachial streak C. tschebaiewi, p. 94.