Prionochilus Strickl., P. Z. S., 1841, p. 29. . Type, Prionochilus ignicapillus Eyton.
In this genus the bill is much the same shape as that of Acmonorhynchus, but the sides are slightly concave when viewed from above and the nasal bristles are entirely absent. The wing has ten primaries of which the first is more than one-third the length of the second ; the tail is square.
In Prionochilus the males are very brightly coloured and the sexes are dissimilar.
Key to Species.
A. Upper plumage blue………..P. ignicapillus p. 437.
B. Upper plumage green.
a, Lower plumage unstreaked………..P. ignicapillus, p. 438.
b. Lower plumage streaked.
a1. Crown-patch crimson………..P. maculatus, p. 438
a1. Crown-patch orange-yellow P. maculatus, p. 439.