"With the exception of the genus Molpastes, the present genus contains a far greater number of species and subspecies than any other and of these there are representatives found from Ceylon to Central India and from Arrakan to the Malayan Islands and again East through the Kachin Hills to China. The genus is, however, not represented in Northern India or North-West Burma.
In Pycnonotus the bill is of small size and the nuchal hairs are obsolete or small. Many of the species are of dull colour but a few are of brilliant plumage.
Key to Species.
A. Throat white. [p. 410.
a.Forehead and crown dark brown P. goiavier analis, [p. 411
b.Forehead and crown black P. aurigaster xanthorrhous,
B.Throat grey streaked with bright yellow P. finlaysoni, p. 412.
c.Crown black P. melanicterus, p. 414.
d.Crown yellow P. xanthoIce?mis, p. 415.
D.Throat ruby-red P. gularis, p. 415.
E.Throat slaty-blue P. cyaniventris, p. 416.
F.Throat brown or grey.
e.Under tail-coverts yellow P. luteolus, p. 417.
f. Under to 1-coverts brown or buff.
a1. Ear-coverts silvery-white or with
silvery-white shafts P. plumosus, p. 418.
b1 Ear-coverts like the crown.
a2. Wing over 75 mm P. simplex, p. 421.
b2 . Wing under 75 mm P. erythropthalmus, p. 422.