Birds of Cameroon Mountain. 501 



a. S. (No. 1). Caaieroou Mt, 7000 ft. 5.iv. 09. Type 



of the species. 



6. c? imni. (No. 4). „ „ 10. iv. 09. 



c. S ad. ^No. 2). „ „ ll.iv.09. 



c?. c? imm. (No. 3). „ „ 24. iv. 09. 



The type-specimen of this fine new form was sent from 

 Cameroon by Boyd Alexander to Ogilvie-Grant, who ex- 

 hibited the bird on his behalf at tlie November meeting 

 of the British Ornithologists' Club in 1909. 



In the original description B. camerunensis is compared 

 with B. hrachypterus (Vieill.) and with B. sylvaticus. It 

 most nearly resembles the former, " but the upperparts 

 are much darker brown, with but little trace of rufous, and 

 the spotting on the upper chest is much fainter.'^ A 

 notable distinction is that B. camerunensis has only ten tail- 

 feathers, whereas in B. braclnjpterus and B. sylvaticus there 

 are twelve. 



Specimens No. 3 and 4 are not fully adult and are each in 

 a different stage of jolumage. 



No. 3 is almost similar to the type-specimen, but has not 

 entirely lost the spotting on the breast which is almost 

 obsolete in the fully adult bird. Moreover, it is a shade 

 darker on the underside. It has, however, practically- 

 assumed the adult plumage which is perfectly fresh, and in 

 consequence the bird is more richly coloured than the type, 

 which is a little worn. The wing of this bird is fully 

 grown. 



Specimen No. 4 is quite a young bird and is so different 

 from the adult that I shall describe it : — 



Immature. Differs from the adult in having the upper- 

 parts of a darker brown. Chin and throat greenish-buff, the 

 feathers on the npper breast tipped with earth-brown which 

 gives to it a somewhat spotted appearance ; lower breast, 

 flanks, and thighs earth-brown, belly yellowish-buff. 



The measurements of the two adult birds are : bill 

 12"5 mm. ; wing 57-59; tail 56; tarsus 23. 



[Rare, breeding, shy, extremely difficult to observe, 

 always threading its way through the thick growth. The 



