| OCR Text |
Show 1869.] ON THE GENUS MICRASTUR. 365 (in the place of Brachypterus of Lesson, previously employed), embraces a series of American Hawks with the general structure of Accipiter, but distinguished by their short toes and more rounded tail. W e have examined specimens of seven species of it, which may be shortly distinguished as follows :- A. Majores: subtus albi fere unicolores. a. major, supra nigricans 1. M. semitorquatus. b. minor, supra cinereus 2. M. mirandollii. B. minores : subtus albi, dense transfasciati. a. dorso rufo: pileo cinereo: a", minor : dorso dilutiore rufo 3. M. ruficollis. b". major: dorso saturatiore rufo 4. M. zonothorax. b. dorso cinereo: pileo concolore: a", ventre imo et crisso albis immaculatis 5. M. gilvicollis. b". ventre imo et crisso cinereo transfasciatis: a", dorso dilutiore cinereo 6. M. leucauchen. b"'. dorso saturatiore cinereo 7. M. guerilla. 1. MICRASTUR SEMITORQUATUS. Sparvius semitorquatus, Vieill. N. D. x. p. 322, et Enc. Meth. p. 1263. Sparvius melanoleucus, Vieill. N. D. x. p. 327, et Enc. Meth. p. 1267. Falco brachypterus, Temm. Pl. Col. 116 (jr.) et 141 (adult.). Micrastur brachypterus, Pelz. Orn. Novara, p. 12, et Orn. Bras. p. 7. Micrastur semitorquatus, Scl. et Salv. Ibis, 1859, p. 218 ; Lawrence, Ann. L. N. Y. ix. p. 134. Climacocercus brachypterus, Burm. Syst. Ueb. ii. p. 88. Falco leucomelas, Licht. Doubl. p. 62. Carnifex naso, Lesson, Rev. Zool. 1842, p. 379. Falco percontator, Cabot, Boston Journ. iv. p. 462. Hab. Rio Janeiro (Natt.); Mato Grosso (Natt.) ; Borba (Natt.); Rio Negro et Rio Brancho (Natt.) ; Costa Rica (Zeledon) ; Guatemala (Salvin) ; Yucatan (Cabot). This species, well known by the figures of the adult and young in Temminck's * Planches Coloriees,' is widely distributed throughout Tropical America, from Yucatan to Paraguay. It does not, however, appear to occur in the wood-region of Eastern Brazil, nor have we yet seen specimens from New Granada and Ecuador. In Guatemala it seems to be rare, as Salvin only obtained one specimen from Retaluleu, in the forest-region bordering the Pacific. Another Guatemalan specimen, in the Norwich Museum, is probably from Vera Paz. The large size of this bird renders it easily distinguishable from every other species of the genus. 2. MICRASTUR MIRANDOLLII. Astur mirandollii, Schl. Ned. Tijdschr. i. p. 130, et Mus. de P.- B. Astures, p. 27. Micrastur macrorhynchus, Natt. M S . ; Pelz. Orn. Novara, p. 21, et Orn. Bras. p. 7. |
