VI CAPITONIDAE 451 
the rump being yellow; the upper tail-coverts: scarlet ; the fore- 
head, sides of the head and lower parts yellow, with a tinge of scarlet 
on the throat, which is followed by a black and white gorget. 
The fine occipital crest is black, the beak green; the feet and 
orbits are dusky. Z. margaritatus, of North-East Africa, has 
brown upper parts with round white spots; the wpper and lower 
tail-coverts are crimson; the rump, head, neck, and under surface 
are yellow, except for the crown and marks on the hind-neck and 
throat, which are black, and for an indistinct chest-band of red, 
surmounted by one of brown. The beak is red, the feet are bluish. 
The exclusively Central and South American Capito is the only 
genus 1n which the sexes differ; the dozen or more species have, 
moreover, few bristles round the bill. C. niger of Guiana is 
black above, varied with yellowish and buff, and sulphur-yellow 
below with a few black spots, which become plentiful in the 
female. The forehead, cheeks, and throat are orange-scarlet, the 
bill is plumbeous. ©. salvini of Costa Rica and Panama has 
green upper and yellow under parts; most of the head and the 
throat being scarlet, the flanks green and white, and a whitish 
band descending the sides of the neck. The female lacks 
the scarlet, but has a dull golden crown and nape, pale blue 
cheeks, and an orange gorget below the green throat. The 
bill is greenish-yellow, the orbits are yellowish.  Zetragonops 
rhamphastinus of Ecuador, in which the nostrils lie in grooves, has 
the crown black, with white sides merging gradually into a blue- 
grey throat; a glossy black nuchal crest ; a rufous-olive mantle; 
orange lower back and upper tail-coverts; blackish-blue wings 
and tail; scarlet breast with orange sides; and yellowish-green 
abdomen. The bill is orange-yellow with dusky tip. 7 
frantzii of Costa Rica, called “ Gallinita” from its chicken-like 
cry, has greenish-olive upper and yellowish-green lower parts, 
with golden-orange forehead, cheeks and throat, a plumbeous bill, 
and a similar crest to its congener. This genus bears a certain 
resemblance to the Toucans. 
Sub-fam. 2. Jndicatorinae—The Honey-guides are contained 
in the two genera Indicator and Prodotiscus, with nine and two 
species respectively, which were formerly placed among the Cuckoos. 
Their chief interest centres in the fact that they are said to 
eenduct travellers to bees’ nests, as will be seen below. 
From the Capitoninae, Jndicator differs in the stout Finch- 
