322 MR. R. B. SHARPE ON THE BIRDS OF LABUAN. [Apr. 1, 



Order ACCIPITRES. 



Suborder Falcones. 



Family Falconid^e. 



Subfamily Accipitrinje. 



1. Circus spilonotus, Kaup. 



Circus spilonotus, Sharpe, Cat. B. i. p. 58; id. Ibis, 1877, p. 2. 



A new species for Labuan, where Mr. Ussher obtained an imma- 

 ture male in September 1876 and a fine adult male in January 1877. 

 This Harrier was first introduced to the notice of naturalists as a 

 Bornean bird by Mr. Alfred Everett (cf. Sbarpe, Ibis, 1876, p. 30). 

 Governor Ussher has also sent it from Brunei, as will be seen by the 

 list of birds published by me in the ' Ibis' for the present year. Mr. 

 Treacher sent a pair of young birds from Labuan, but without indi- 

 cation of the native name beyond the word " Alang," which means 

 " Hawk." 



Subfamily Buteoniinle. 



2. Butastur indicus (Gm.). 



Butastur indicus, Sharpe, Cat. B. i. p. 297 (1874). 



Poliornis indica, Salvad. t. c. p. 9. 



Included in his work by Count Salvadori, with a query, no speci- 

 men having been sent from Borneo up to the time he wrote. 

 Governor Ussher was therefore the first discoverer of the species 

 in the Bornean avifauna. Five specimens were shot by him in dif- 

 ferent plumage in September and October 1876. Mr. Treacher 

 also sends five specimens, and gives the native name as "Alang alap 

 alap." Four of them are fine adult birds ; and one is young ; the 

 latter, in addition to the mottled plumage and streaked breast, has 

 five dark brown bands on the tail, much narrower than in the adult. 

 One of Mr. Treacher's skins (the young bird) had the same native 

 name "Alang juali" as the Peregrine Falcon, showing apparently 

 that the natives have a different name for the young bird, or else 

 that the collector mistook it for the young of the Peregrine. 



Subfamily Aouilin^:. 



3 Spizaetus limnaetus (Horsf.). 



Spizaetus limnaetus, Sharpe, t. c. p. 272 ; Salvad. t. c. p. 15. 



" Not uncommon, but extremely shy and difficult of approach ; 

 it is a great foe to poultry, and also feeds on shell-fish " (H. T. U.). 



Mr. Low sends a nestling, nearly full-grown, which is black all 

 over, like the adult, of which three specimens are in Mr. Ussher's 

 collection. This seems to show that I am wrong in considering the 

 the S. caligatus of Raffles to be the young of S. limnaetus, as I have 

 put forward in my ' Catalogue of Birds ' (I. c.) ; but in Mr. Trea- 

 cher's collection was a young bird in the striped plumage (similar to 

 S. cirratus), with five bands on the middle and seven on the outer 

 feathers. Although I at present keep only one species of Spizaetus 



