4 THEORY UF BIRDS’ NESTS. 241 
diops of Ternate. In others the band is rufous in the 
female, as in several of the American species; while 
in Dacelo gaudichaudii, and others of the same genus, 
the tail of the female is rufous, while that of the male 
is blue. In most kingfishers the nest is in a deep 
hole in the ground; in Tanysiptera it is said to be 
‘in a hole in the nests of termites, or sometimes in 
crevices under overhanging rocks. 
2. Motmots (Momotide). In these showy birds the 
sexes are exactly alike, and the nest in a hole under 
ground. . 
_ 3. Puff-birds (Bucconide), These birds are often 
gaily coloured; some have coral-red bills; the sexes 
are exactly alike, and the nest is in a hole in slop- 
ing ground. 
4, Trogons (Trogonide). In these magnificent birds 
the females are generally less brightly coloured than the 
males, but are yet often gay and conspicuous. The 
nest is in a hole of a tree. 
5. Hoopoes (Upupide). The barred plumage and 
long crests of these birds render them conspicuous. The 
sexes are exactly alike, and the nest is in a hollow tree. 
6. Hornbills (Bucerotide). These large birds have 
enormous coloured bills, which are generally quite as 
well coloured and conspicuous in the females. Their 
nests are always in hollow trees, where the female is 
entirely concealed. 
7. Barbets (Capitonide). These birds are all very 
gaily-coloured, and, what is remarkable, the most bril- 
liant patches of colour are disposed about the head and 
R 
