Plate LXIX. 



ACCIPITER BICOLOR 



(VIEILLOT'S SPAEEOW-HAWK). 



Sparvius hicolor 



" JSfisus variatus, Cuv." 



Accipiter sexfasciatus 



Nisus sexfasciatus . 



" Micrastur dynastes, Verreaux, 



Accipiter pileatus 



Accipiter eryihrocnemius . 



Vieill. N. D. x. p. 325 (1816), et Enc. Meth. p. 



Less. Tr. d'Orn. p. 61 (1831). 



Sw. An. in Menag. p. 282 (1838). 



Cab. in Schomb. Guian. iii. p. 736. 



Bp. Notes Orn. p. 4. 



Scl. P.Z.S. 1859, p. 389. 



Salv. Ibis, 1861, p. 355. 



Lawr. Ann. Lye. 1ST. S. vii. p. 289, et ix. p. 134. 



Scl. P.Z.S. 1860, p. 96, (err.) 



1265. 



Supra saturate cineraceo-nigricans, pileo nigro : subtus scbistaceus, lineolis angustis nigris in plumarum rachidibus 

 ornatus, subalaribus et ventre imo cum crisso albis ; tibiis saturate ferrugineis : remigibus subtus nigricantibus, albo 

 frequenter transfasciatis ; cauda subtus nigra albo trivittata : long, tota 15*0, alse 8'5, caudse 6'5, tarsi 2*4, dig. med. 

 c. u. 1*9. Fern, mari similis, sed major, long, tota 17*0, ala3 9*7, caudae 7"5, tarsi 2*6, dig. med. c. u. 2*2. Junior, 

 Supra omnino fumido-brunneus, torque angusto collari albicante : subtus unicolor lactescenti-albus, fulvo perfusus, 

 tibiis pallide rufescentibus. 



Hab. in America continentali tropica a Mexico meridionali usque ad Guianam : Mexico merid. (Boucard) ; 

 Guatemala (Salvin) ; Costa Eica (Carmiol) ; Veragua (Arce) • Panama (McCleannan) ; Nov. Granada int. Bogota 

 (Mus. S — G.); rep. Equator. (Fraser) ; Yenezuela (Levraud) ; Guiana (ScTwmburgk) ; Cayenna (Poiteau et Lehlond). 



After examination of a large number of specimens of Accipiter pileatus (usually so called) 

 from various parts of Tropical America, we have come to the conclusion that two species 

 remain confounded under this name besides the Accipiter chilensis, of which we have already 

 given a figure. The most noticeable points of distinction between these two birds are as follows. 

 In the true A. pileatus of Prince Max., the adult of which is well figured in Temminek's 

 Planches Coloriees (205), the under-wing-coverts are deep red of nearly the same hue as the 

 thighs. Again, the young bird of the Brazilian species, which appears to be represented by 

 the same author (PI. Col. 295) as the young of his Falco poliogaster, is always conspicuously 

 spotted beneath, more especially on the flanks. But in the northern representative, which we 

 now illustrate, it will be apparent that the under-wing-coverts of the adult are white, and 

 that, if our views are correct, in the immature stage the under-surface is of a uniform pale 

 fulvous without spots of any kind. 



The name pileatus being retained for the Brazilian bird it remains to discover what is the 

 oldest specific term strictly applicable to the northern species. This, as will be seen from our 



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