BIRDS FROM NIAS. 1^7 



Bornean examples that it is really a distinct, constantly 

 larger species. In his List of Birds of Borneo , p. 145 

 (1889), Mr. A. Everett enumerates the following species 

 of Crows as inhabiting Borneo and the adjacent islands: 



Corone macrorhyncha . 



Corone enca (apud Sharpe, Cat., therefore identical with 

 the Malayan C. tenuirostris). 



Corone pusilla (a Philippine bird, not found in Borneo) '). 



Corone tenuirostris . 



Corone philippina (a Philippine bird, not found in Borneo). 



In resuming the matter, it may be stated here that from 

 the whole Malay Archipelago, including the Malayan Pen- 

 insula, Celebes and the Sula Islands, and all the Islands 

 from Java to Timor Laut, there are known the following 

 four distinct species of Crows : 



a. Plumage above and below with a strong pur- 

 plish gloss, throat-feathers not different in shape 

 from those on the surrounding parts. 



a'. Feathers white or grayish white at the base, 



base of culmen broad and flat, not hidden 



by bristles. 



a". Larger, wing 30 — 33 cm., bill slender, 

 slightly bent downward , culmen 6 — 

 6,8 cm C'. tenuirostris. 



b". Smaller, wing 26,5— 30 cm., bill shorter 

 and stouter, more strongly curved, and 

 the culmen more strongly arched, 5,5 — 



5,8 cm C. enca. 



h' . Feathers dark gray at the base. A very small 



species: wing 22,7 cm., bill as in C. enca, 



but culmen only 5 cm., narrow, and entirely 



hidden by bristles C. florensis. 



b. A large form ; plumage purplish on the upper, 

 greenish steelblue on the lower surface, throat- 

 feathers in adult birds large, lanceolate, with a 

 strong metallic gloss. Bill very large and stout, 



1) Dr. Sharpe inclines to the opinion that C. pusillus Tweedd. from Palawan 

 must be referred to C. enca. I am sorry to say that I never saw a specimen 

 of this species. 



Notes from the Leyden IMuseum, Vol. XVIII. 



