Head, crescent commencing behind the eye and crossing the chest and the
tail black; throat pure white; collar round the back and sides of the
neck, and all the under surface very rich gamboge-yellow; upper surface
rich yellowish olive; wings black, the coverts margined with yellowish
olive; the primaries narrowly and the secondaries broadly margined with
yellowish grey; bill and feet black; irides brown.
The figures are of the natural size.
[Illustration: