Birds of Southern Cameroon. 493 



When exploring a palm-tree^ a Polyboroides Malks along 

 the branches a great deal, flying only where the frond 

 becomes too slender to support its weight. 



ASTUR CASTANILIUS, 



Sliarpe, Ibis, 1904, pp. 99, 597; 1907, p. 425. 



No. 2060. S ad. Bitye, R. Ja, Nov. 1906. Length of 

 wing 155 mm. 



No. 4435. S 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 ('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 aidnddk-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. 



AsTUll 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, (J 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. 



