493 
Birds of Southern Cameroon. 
When exploring a palm-tree, a Polyboroides walks along 
the branches a great deal, flying only where the frond 
becomes too slender to support its weight. 
ASTUII CASTANILIUS. 
Sharpe, Ibis, 1904, pp. 99, 597; 1907, p. 425. 
No. 2060. <$ ad. Bitye, B. Ja, Nov. 1906. Length of 
wing 155 mm. 
No. 4435. ^ ad. Bitye, R. Ja, Oct. 1910. Iris dark 
red ; feet and cere yellow; bill and claws black (one claw 
white). Length of wing 155 mm. ; tail 140 mm. 
These specimens are just like the type in the British 
Museum (Verreaux Coll.), except that the back of 
No. 4435 is of a lighter grey colour (that of the type is 
blackish) and the under tail-coverts are entirely white. In 
size they agree exactly with the type and with other male 
specimens I have procured. In the females the length of 
the wing is 180 to 185 mm. This has already been pointed 
out by Dr. Sharpe ( f Ibis/ 1904, p. 100), but it seems worth 
while to mention it again, because the range of measure¬ 
ments given by Reichenow appears to be incorrect. 
No. 2060 was caught in a snare in the following manner :— 
A small bird that had been snared on an atondok -tree had 
been partly eaten by the Hawk when found by the boys 
who were snaring birds. The boys left the small bird 
hanging and fixed a noose to catch the Hawk when it 
returned to complete its meal. 
Astur toussenelii. 
Sharpe, Ibis, 1904, pp. 100, 597; 1907, p. 425. 
No. 4299, ? ad. Bitye, R. Ja, July 1910. Iris orange; 
feet yellow; cere and skin about eye yellow to orange; 
bill black, grey at base. Length of wing 225 mm. 
No. 3268, S imm. Assobam, Bumba R., Dec. 1908. 
Iris light yellow; bill black, bluish at base; cere, skin around 
the eye, and feet pale yellow ; claws black. Length of wing 
193 mm. 
The length of wing in the type specimen (Verreaux Coll.) 
is 198 mm. 
