Plate LXIX. 



ACCIPITER BICOLOS. 



(VIEILLOT'S SPAEEOW-HAWK). 



Sparvius hicolor 



" Nisus variatus, Cwv." 



Acciijiter sexfasciatus 



JSisiis sexfasciatus 



" Micrastur dynastes, Verreaux 



jiccipiter pileaius 



Accipiter erytlirocnemius . 



Vieill. N. D.x. p. 325 (1816), et Eac. Meth. p. 1265. 



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



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



Cab. in Scliomb. Gruian. iii. p. 736. 



Bp. Notes Orn. p. 4. 



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



Salv. Ibis, 1861, p. 355. 



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



Scl. P.Z.S. 1860, p. 96, (en-.) 



Supra saturate cineraceo-nigricans, pileo nigro : subtus sebistaceus, liueolis angustis nigris iu plumarum rachidibus 

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

 frequeutfer transfasciatis ; cauda subtus nigra albo trivittata : long, tota 15-0, ate 8-5, caudae 6-5, tarsi 2-4, dig. med. 

 e. u. 1-9. Mm. mari similis, sed major, long, tota 17-0, alse 9;7, caudse 7;5, tarsi 2-6, dig. med. c. u. 2-2. Junior^ 

 Supra omtlinofumido-brunneus, torque angusto collar! albieante : subtus unicolor lactescenti-albus, fulvo perfusus, 

 tibiis pallide rufescentibus. " ' '•. ' 



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

 Guatemala (<S'aZuJw) ; Costa Eica {Carmiol) ; Veragua {Arce) ; Panama {McCleamian) ; Nov. Granada, int. Bogota 

 {Mus. S—G.); rep. .Equator (Fraser) ■ Venezuela {Zevrdrnf) ; Guiana (^Schomburyk) ; Cayenna {Poiteau et Leblond). 



After examination of a large number of specimens of Accipiter pileatiis (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 ckilensis^ of which we have afready 

 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 Temminck'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, Avhich 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 bii-d it remains to discover what is the 

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



[ 137 ] 



