686 REPORT OF THE HARVARD AFRICAN EXPEDITION 
Lophoceros hartlaubi hartlaubi (Gould). Dwarf Hornbill 
Toccus hartlaubi Gould, Proc. Zool. Soc. London for 1860, p. 380, 1861: West Africa. 
Small, length about 16 inches; head, throat, and upper side of body grayish black; a grayish 
white eye-stripe; below, white mixed with gray; wings black with broad white inner edges; tail 
steely black, the three outer feathers with white tips; naked skin about eye black, passing to yellow 
and violet red at sides of throat; bill with short compressed horn, black with red tip. Liberia 
to Cameroon. 
The slaty-black bill with a dark red tip should distinguish this bird in the 
field. It is apparently rare, for Biittikofer secured but a single pair and speaks 
of it as confined to the forest, going about singly or in pairs, and a very silent 
bird. Currie, who secured it at Mount Coffee, notes that it is locally called 
Monkey-bird. Oberholser regards this as a separate genus for which he has 
proposed the name Horizocercus. 
Lophoceros camurus pulchrirostris (Schlegel). 
Buceros pulchrirostris Schlegel, Ned. Tijd. Dierk., vol. 1, p. 74, pl. 4, 1863: St. George d’Elmina, 
Gold Coast. 
Length about 13 inches; head, neck, and body above reddish brown, throat-feathers white- 
edged; belly and under tail-coverts white; wings black, the coverts and edges with white markings; 
tail blackish, the outer feathers white-tipped; bill red, in the female black. Liberia to Loango. 
Like the preceding, this is a species of the high forest, and apparently un- 
common, for we did not secure it. Buttikofer mentions obtaining six at Soforé 
Place, as well as others from Hill Town and the Junk River while Chubb records 
it from St. Paul’s River. The bright scarlet bill should be a good field-mark. 
Tropicranus albocristatus albocristatus (Cassin). White-crested Hornbill; ‘‘Monkey-bird”’ 
Buceros albocristatus Cassin, Proc. Acad. Nat. Sci., Philadelphia, vol. 3, p. 330, 1848: St. Paul’s 
River, Liberia. 
A large species with very long graduated tail; head white, the longer feathers with black shaft- 
stripes, and forming a crest; elsewhere blackish with green reflections. Each feather of the tail 
with a short white tip; bare throat patches pink. Females slightly smaller with smaller bills. 
Liberia and Sierra Leone. 
The White-crested Hornbill is a bird of the forest, seldom seen in the open, 
but keeping in the shelter of the trees or sometimes coming into thick cover 
of small trees and even alighting on the ground to feed. Apparently it is not 
social and is seen singly or in pairs, silently travelling by short flights through 
the thick forest. We saw it occasionally for though it is fairly common it is 
not at all conspicuous. Biittikofer records nestlings half-fledged in the end of 
January from St. Paul’s River and Cape Mount, and Oberholser has recorded 
(under Ortholophus leucolophus) an immature bird, taken April 30, with the 
white throat of the first plumage. It is locally called ““Monkey-bird,” on account 
of the belief that it follows monkeys and warns them of danger. The truth 
probably is that it is partial to the thick high trees and feeds to some extent 
on the same fruits as the monkeys. 
