collected in Dutch New Guinea. 181 



varies greatly, and is not alike in any two individuals in the 

 series before me. Iji the fully adult bird the breast is 

 uniform greyish-black, and only one or two of the longest 

 under tail-coverts are narrowly tipped with white. 



" The White-crowned Black Cuckoo was heard and found 

 everywhere, though it was much more plentiful in the 

 mountains, and was especially so around my highest camp 

 on the Iwaka River. It is rather a wild bird with a strong- 

 flight, andj as a rule, fre(|[uents the higher trees. The call 

 consists of three distinct whistles, and is, as far as I can 

 remember, exactly similar to that of Cuculus solitarius oi 

 Africa."— C.ff.i.G. 



Cumulus optatus. 



Cuculus intermedius Shelley (nee Yahl), Cat. xix; p'. 252 

 (1891). 



Cuculus optatus Gould ; Roths; &HartertjNi Z.- xx. p. 489 

 (1913). 



a,- h. ? et cT imm.- MoUth of the Mimika Riverj 10th Dec- 

 1910 & 23rd March, 1911. [Nos. 102, 1243, C.H.B. G.] 



c,- d. c? imm. et ^ juv. (in first plumage). Parimau, 

 Mimika River, 9th & 17th Nov; 1910. [Nos. 1493, G. C. S. ;■ 

 & 508, C. H. B. G.j 



e. ^ . Launch CaiHp, Setakwa Eiverj 31st March, 1913.- 

 [C.B.K.-] 



f. $ imm. (in the' hepatic stage).' Canoe Camp,- Setakwa 

 River, 16th Nov. 1912. [C. B. K.'] 



Adult. Iris yellow ; eyelid yellow ; tipper mandible horn- 

 brown, lower mandible yellow, dark at the tip ; feet bright 

 ochre. 



Immature'. Iris dark bro'wn ; bill bkck albove, basal half 

 ©•f lower man'dible yellow ; gape orange ; feet deep yellow.- 

 These specimens vary considerably in size : — 

 J adult {e). Wing 194 Mm. 

 ? adiilt {a). ,, 191 „- 

 S imm. (c). „ 199 ., 



cJ imm. [h). „ 195 



S imm. [d). , 179 ,, 



$ imni.(/). 180 „. 



