Besides the two examples in the British Museum, which were purchased in 1851 and are 

 said to have been received from Bolivia, we have only met with one other example of this species 

 — a mounted specimen in the Norwich Museum, fi-om which our figure has been prepared. 



The following are the known American species of the present group of Accipitei\ which 

 embraces the lai-ger species allied to A. pileatus and A. cooperi. Prince Bonaparte has applieil 

 to them the barbarous iiatoe Cooper-aitur ( ! ) (Rev. Zool. 1854, p. 538.) 



Sect. A. Species uniformly coloured beneath, as in A. pileatus^ — 



1. A. PILEATUS. 



Falco pilealui, Temm. PI. Col. 205 ; Max. Beitr. iii. p. 107 : Nisus pileatus, Burm. Syst. Ueb. ii. p. 73 : Accipiter 



pileatus, Lawr. Ann. N. Y. Ljc. yii. p. 254. " Nisus variatus — Cuv." in Mus. Par. (partitn.) 

 Sab. S. E. Brazil, 



2. A. BicoLOB, Ex. Orn. tab. Ixix^ p, 137. 



Sab. Guiana, Upper Amazon, Ecuador, and northwards to North America. 



Sect. B. Species more or less mottled beneath, as in A. cooperi., — 



3. A. COOPEBI. 



Falco cooperi, Bp. Am. Orn. ii. t. 1. F. stanleyi, Aud. Orn. Biogr. p. 186. Accipiter cooperi, Cassin, in Baird's 

 Birds of N. Am. p. 16. Scl. P.Z.S. 1859, p. 389 : 1866, p. 304 : Scl. & Salv. Ibis, 1860, p. 401 : Lawr. 

 Ann. Lye. N. T. ix. p. 134. Ace. mexicanus Sw. et auctt. Americ. (?) 

 , Sab. Temperate N. America, and southwards to Costa Eica. 



4. A.,QUNDI,ACHI. 



Accipiter cooperi, Lembeye, Aves de Cuba, p. 17 : Nisus pileatus, Lembeye, 1. c. p. 125. Astur pileatus. Cab. 

 et Gundl. J. f. Orn. 1854, Extra-h. p. Ixxxii. Accipiter ffUndlachi, Lawr. Ann. Lye. N. T. vii. p. 252 : 

 ' ; Gundl. Kep. P. N. i. p. 224. 

 Sab. Cuba. 



5. A.^guttItus, Ex. Orn. tab. Ixxxv. p. 169. 



Sab. Bolivia and Paraguay. 



6. A. 'cHiLENsis, Ex." Orn. tab. xxxvii. p. 73. 



Sab. Chili and Patagonia. 



Sect. C. Species broadly barred below, and with the breast rufous, — 



7. A. PECTOEALIS. 



Falco pectoralia, Bp. Eev. Zool. 1850, p. 490— ^cc. pectoralis, Sclater, Ibis, 1861, p. 313, t. 10 et P.Z.S. 18G6, 



p. 304 — Astur pectoralis, Pelz. Orn. Bras. p. 6 — Schlegel, Mus. de P. B. Astures, p. 18. 

 Sab. Brazil : Tpanema and Borba, (Natt.) 



Afbil, 1S69. 



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