•Plate XXXVII. 



ACCIPITER CHILENSIS. 



(CHILIM SPAEEOW-HAWK). 



Accipiter cliilensis . . . Phil, et Landb., Wiegm. Arch. 1S64, p. 43. 



... Scl. P.Z.S. 1867, p. 329. 

 Accipiter cooperi . . . Pelz. Novara-Eeise, Vog. p. 13. 



Supra fumido-uiger, pileo nigricante : subtus ex rufescente cinereus, albo maculatus ; his maculis utrinque nigro 

 jnarginatis : tibiia ferrugineo-rufis : subalaribus rufis nigro punctatis : cauda supra fumido-nigra, subtiis albescenti- 

 cinerea, quinquiea nigro-vittata : rostro nigro, pedibus flavis : long, tota 17'5, alas 9'5, caudae 7'5, tarsi 3'0. — Avis jr. 

 Plumis suprk fusco marginatis, subtus albus nigro flammulatus, tibiis albidis, nigro maculatis. 



Sab. Chili (FMl. et Landb.): Magellan-straits (King). 



The Chilian Sparrow-hawk appears to have been always passed over unrecognized, and 

 confounded with its allies Accipiter pileatus and A. cooperi^ until it was described by Messrs. 

 Philippi and Landbeck in 1864. Aided by their accurate diagnoses of the various plumages, 

 we had no difficulty in finding specimens of it in the rich stores of the National Collection, 

 where they had been previously treated as forms of A. pileatus. We believe, however, that 

 there is no question as to the constancy of the differential characters of the Chilian bird, and 

 we have great pleasure in giving the first representation of it, under the name bestoAved upon 

 it by Messrs. Philippi and Landbeck. 



On reference to our plate, the differences between the adult plumages of A. cliilensis and 

 A. pileatus., as figm-ed in Temminck's Planche Colori^, 205, will be at once manifest. In the 

 latter, the under plumage is of a nearly uniform brownish cinereous. In A. cliilensis., the 

 plumage beneath is thickly barred with white, and these white bars are in tm-n narrowly 

 bordered with black. The immature plumages of the two birds may not in all cases be so 

 easily distinguishable, nor have we at present materials sufficient to enable us to point out the 

 differences accura,tely. But if our identification of the young birds in the British Mugeum is 

 correct, the young A. pileatus is the bird figured by Temminck (PI. Col. 295) as the young 

 of A. poliogaster., and differs from the young of A. cliilensis in being unspotted in the middle 

 of the belly, and more tinged with rufous below. 



The Chilian Sparrow-hawk, as we are informed by Messrs. Philippi and Landbeck, inhabits 

 the greater part of Chili ; at least, it has been noticed by these Naturalists from the Province 



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