456 CORACIIFORMES CHAP. 
nearly the same range as that of the Family, including the type 
and sole Argentine species £2. toco, one of the largest forms, two 
feet in length. This is black, with white rump, throat and fore-neck 
(the last bordered with red), crimson vent, blue orbits, and orange 
bill terminally blotched with black, which has been likened 
to a lobster’s claw. Several species have the throat and rump 
yellow or orange, or the latter scarlet, as in &. ariel. The brillant 
bill and orbits vary considerably in colour; the tail is square. 
Andigena comprises some five forms from the highest forests of 
Colombia, Ecuador, Peru, and Bolivia, olive-brown or dark green 
above, and with hair-like bluish-grey plumage below; the crown 
is black, the nape black or grey, the vent scarlet, the rump 
yellow, and the tip of the graduated tail chestnut, except in one 
instance. The bill shews black, yellow, or red, in varied combina- 
tion, A. /aminirostris having a square ivory-white basal plate on 
each side of the maxilla. A. bailloni, of South-East Brazil, doubt- 
fully placed in this genus, has a scarlet rump, yellow under parts, 
greenish and reddish bill, and red orbits. Pteroglossus, the most 
brilliant genus in the Family, exhibits green, scarlet, and yellow 
hues, with areas or bands of black and scarlet on the lower sur- 
face in thirteen out of eighteen species. The tail is graduated, and 
the feathers below are somewhat hair-like. These Aracaris, as they 
are called, range from South Mexico to Bolivia and South Brazil. 
The lovely P. beauharnaisi, of Upper Amazonia, has dark green 
upper parts, with crimson on the rump and mantle; and light yellow 
lower parts, tinged with red, which shew a scarlet ventral band 
and black spots on the throat; the maxilla is black with orange 
culmen, the mandible white. P. aracari of Guiana and Lower 
Amazonia has no red on the mantle, the smooth head and throat 
are black, the maxilla is white with black culmen, the mandible 
black. Some six species of Selenidera, remarkable for the dissimilar 
sexes, and generally for the transversely striped or blotched beak, 
range from South-East Brazil and Upper Amazonia to Nicaragua. 
The males, except in S. spectabilis, have a distinct nuchal crescent 
of yellow, less marked in the females; the former have the head 
and breast black, the latter usually chestnut; but the hen of the 
above species has the under surface black, that of S. piperivora 
ereyish-green. The general colour is dark green, with brown tip to 
the tail, yellow or orange ear-coverts, and scarlet vent; the beak is 
whitish, reddish, or greenish, with black markings. Aulacorham- 
