ACCIPITER. 47 



subtus fuscis, griseo-albo fasciatis ; subalaribus rufis, albo fasciatis ; Cauda sehistacea, nigrioanti-quadri- 

 fasciata, apice alba: rostro nigricante, cera et pedibus flavis. Long, tota circa 16'0, alae 9'0, caudse 8'7, 

 tarsi 2-3. (Descr. maris ex San Miguel Molino, Puebla, Mexico. Mus. nostr.) 



5 mari similis, sed major et paulo obscurior. 



cJ juv. Supra fuseus, plumis omnibus plus minusve rufo marginatis, scapularibus et tectricibus caudse superioribus 

 maculis celatis albis aotatis : subtus albus, cervino tinctus, plumis omnibus in pectore stria rhacbidali 

 fusca latiore. 



Hab. North Ameeica, temperate regions i^. — Mexico, Hermosillo in Sonora, (Ferrari- 

 Perez), Mazatlan [Grayson^), Canada in Chihuahua {W. Lloyd), Guanajuato, 

 Guadalajara {Duges"^), Sierra de Valparaiso, Sierra de Nayarit (W. B. Richardson), 

 Hacienda de San Marcos near Zapotlan (W. Lloyd), San Miguel Molino (Ferrari- 

 Perez), Omilteme (Mrs. H. H. Smith), Orizaba (Sumichrast ^°j, Oaxaca (Fenochio), 

 Totontepec (Boucard ^), Tonala ^°, Santa Efigenia ^ '^^ (Sumichrast), Chimalapa 

 (W. B. Bichardson) ; Guatemala (Constancia^^), Coban^, Duenas (0. S. & 

 F. B. G.); Costa Kica (v. Frantzius^, Carmiol), El Mojon (Cooper^). 



Cooper's Hawk is a well-known bird in North America as far north as the southern 

 portions of Canada. As its food consists almost exclusively of wild birds and poultry, 

 its depredations are dreaded by the owners of the latter, its boldness being notorious. 

 In Mexico and Central America Accipiter cooperi would appear to be less common, 

 though widely distributed in the former country. In Guatemala we only met with 

 birds in immature plumage, and those but rarely. In Costa Eica it appears to be also 

 scarce, and from the intervening country we have no tidings of it. 



The Mexican bird was separated by Swainson under the name of A. mexicanus, and for 

 some time it was considered to be distinguishable from A. cooperi. Latterly this view 

 has been relinquished, and all southern birds now pass under the last-mentioned name. 



The only other species of Accipiter found in our country at all comparable with 

 A. cooperi in size is A. Ucolor ; but the two are readily distinguishable, the former 

 being white beneath with frequent transverse rufous bars, the latter nearly uniform 

 slate-colour. The young of A. cooperi is covered on the under surface with dark 

 tear-shaped spots, whilst that of A. Ucolor is uniform creamy white. 



The habits of A. cooperi are well described by Capt. Bendire ^^ and Dr. Fisher ^^. 



2. Accipiter bicolor. 



Sparvius bicolor, Vieill. N. Diet. d'Hist. N. x. p. 325 \ 



Accipiter bicolor, Scl. & Salv. Ex. Orn. pp. 137, 170, t. 69^; P. Z. S. 1870, p. 838 'j Salv. Ibis, 



1869, p. 317"; P. Z. S. 1870, p. 215^; Sharpe, Cat. Birds Brit. Mus. i. p. 154"; 



Sumichrast, La Nat. v. p. 336'; Boucard, P. Z. S. 1883, p. 457'; Zeledon, An. Mus. 



Nac. Costa Rica, 1887, p. 126'; Cherrie, Auk, 1892, p. 328". 

 Accipiter sexfasciatus, Swains. An. in Menag. p. 282 " ; Cab. J. f. Orn. 1869, p. 308 ''. 

 Accipiter pileatus, Scl. P. Z. S. 1859, p. 389 (nee Temm.) "; Salv. Ibis, 1861, p. 355 '* ; Lawr. Ann. 



Lye. N. Y. vii. p. 289 '' ; ix. p. 134 " ; v. Frantz. J", f . Orn. 1869, p. 369 ". 

 Supra saturate schistaceus, capite summo nigricante, nuchse plumis ad basin albis: subtus scbistaceus, 



