464 SIGMODUS CANICEPS 
KEY TO THE SPECIES. 
a. Portion of head white, grey or chestnut. 
a1. Forehead white or grey ; crop white. 
a2, Chest white; abdomen rufous buff; chin, cheeks and 
ear-coverts black in adults. 
a’, Blue grey of the head not reaching below the eye. caniceps. 
b8. Blue grey of the head completely encircling the 
eye. .. harterti. 
. Chest rufous ike fle nbdamen’ 9 ean heals aid 
ear-coverts bluish grey. 
c5, A larger grey chin-patch ; front of head whiter. . *rwfiventris. 
d*®, A smaller grey chin-patch; front of head greyer . mentalis. 
61. Forehead chestnut; crop dusky grey like the breast . scopzfrons. 
b. Head and neck black. 
ct. A broad oblique white band on under surface of wing 
quills. 
c?, Mantle blackish brown . 
e®, Mantle browner; wingS-1. . ...=.: . . « Tetzu. 
f®. Mantle blacker; wing53... =... =. =. =. mgricans. 
d?. Mantle more drab-brown. 
g®. Mantle darker; wing52..... =. =. =. . intermedius. 
h®. Mantle paler; wing aader B10) 4 6 0 . . tricolor. 
d*. No white band on the under surface of the quills . . gracuiius. 
Sigmodus caniceps. 
Sigmodus caniceps, Bp. Consp. i. p. 365 (1850) Butri River ; Jard. Contr. 
Orn. 1852, p. 139, pl. 94; Sharpe, Cat. B. M. iii. p. 323 (1877) ; 
Shelley, B. Afr. i. No. 667 (1896); Reichen. Vo6g. Afr. ii. p. 537 
(1903) ; Sharpe, Handl. B. iv. p. 274 (1903); Kemp, Ibis, 1905, 
p. 2385 Sierra Leone. 
Subspecies a.—Sigmodus harterti. 
Sigmodus caniceps harterti, Neumann, Bull. B.O.C. xxi. p. 70 (1908) 
Degama, S. Nigeria. 
Adult. The feathers of the forehead and in front of the eyes are some- 
what bristly and directed forward, and are bluish-white like the crown; 
remainder of the head, the neck, back, wings and tail black, with a greenish 
gloss strongest on the mantle, and a broad white band crossing the inner 
webs of the nine longer primaries forming an oblique band across the wing 
when seen from below; crop and chest pure white shading into pale rufous © 
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