CHAUNONOTUS SABINI 359 
Genus III. CHAUNONOTUS. 
Type. 
Chaunonotus, G. R. Gray, Charlesw. Mag. N. H. i. 
Peton(USSt) yk ie ee ie sk (CL Sabine: 
Resembling Dryoscopus in the need; form and plumage, differing only 
in the bill, which is very large, broad, and flat, and without a ridged culmen. 
Only one species, forming two subspecies. 
Chaunonotus sabini. 
Thamnophilus sabini, J. HE. Gray, Zool. Miscl. i. p. 7 (1831). 
Chaunonotus sabinei, G. R. Gray, Charlesw. Mag. N. H. i. p. 487 (1837) 
Sierra Leone; Jard. Ill. Orn. (2), pl. 27 (1838); Reichen. Vég. 
Afr. ii. p. 598 (1903); Kemp, Ibis, 1905, p. 234 Bo. 
Dryoscopus sabinei, Gadow, Cat. B. M. viii. p. 143 (1883); Shelley, 
B, Afr. i. No. 748 (1896). 
Subspecies a.—Chaunonotus melanoleucus. 
Hapalophus melanoleucus, Verr. Rev. Mag. Zool. 1851, p. 312 Gaboon. 
Chaunonotus melanoleucus, Sharpe, Ibis, 1908, p. 333 Camaroon. 
Adult male. Upper half of the head, including the ear-coverts, back of 
the neck, mantle, and upper tail-coverts glossy blue black; wings and tail 
black, with less blue; remainder of the back pure white, cheeks and under 
parts, under wing-coverts and inner edges of the quills white, rest of the 
quills dusky underneath ; a patch of black on the back of the thighs. “ Iris, 
dark red; feet lead-coloured” (Sjéstedt). Length 7°75 inches, wing 3:4, 
tail 2°8, culmen 0:90, tarsus 0°90. Fantee (Ussher). 
Adult female. Upper half of the head and back of the neck slaty grey, 
shading off into ochraceous brown on the remainder of the upper parts ; 
quills dusky brown, edged with ochraceous; an indistinct whitish eyebrow, 
and some white beneath the eye and a dusky spot in front; under parts, 
including the cheeks, thighs, under wing-coyerts and inner edges of the 
quills bright ochraceous. ‘‘Iris reddish-brown; bill and legs slaty blue.” 
Kemp. Wing 3:0, culmen 0:90. Denkera, 2.72 (Ussher). 
Immature male. Closely resembling the female with pale bill and 
legs. An example obtained at Prahsu in the Gold Coast Colony by 
Alexander, is assuming the male plumage; the crown and nape is mottled 
with black feathers, and some fresh tail-feathers are growing out with 
black bases and yellow tips. 
Subspecies C. s. melanoleucus. The male only differs from that of the 
