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Show 161 GENUS ANTENOR, RIDGWAY. 4 Crajcirti GOULD". CASSIX, Birds X. Am. 1853,4( 5, et AUCT. ( not of GOULD, 1841). Antenor RIDGWAY, Proc. Boston Soc. Nat. Hist. Mav, 1873, 03. Type, Falco unicinctua TEMM. '• rarabuteo RIDGWAY ?\ B. B. & R. Hist. N. Am. Birds, iii. Jan. 1874,248. Same type.* Krythrocnema SHARPS, Cat. Ace. Brit. Mus. July, 1674, 84. Same type. CH.- Similar to Buteo, but live, instead of three or four, outer primaries, with inner websemarginated. Bill as in Buteo, but superior toinium rather more distinctly lobed, and upper outline rather more ascending basally. Tarsus about twice the length of the middle toe; outer toe slightly longer than the inner, which very slightly exceeds the posterior toe; claws strong, well curved, typically buteonine, the posterior equal to or longer than its digit; scutellation typically buteonine; number of transverse plates in front varying from 11 to 12; upper portion of the tarsus feathered in front for nearly half its length. Wing moderately long, the third, fourth, or fifth quills longest; first shorter than the eighth; outer five with their inner webs einarginated, the cutting being very indistinct, however, on the fifth. Tail long, about two- thirds the wing, even, or very slightly rounded. Lore very scantily feathered, the bristles being very fine and scattered. The more closely we have examined this form, the more difficult it has become to appreciate constant characters separating it from Buteo, with the more compactly built members of which, as B. borealis and its allies, it agrees very closely in the details of external form. The main differences consist in the longer tail, more scantily- bristled lores, and the emargination of the fifth primary. It is far less closely related to Uru-bitinga, thongh we had previously hinted at such a relationship, the latter genus differing in much shorter, more rounded wiug, with the inner webs of the primaries very shallowly sinuated. To Astur, it is far more remotely allied, the osteological as well as external differences being very striking. The crauium of Antenor is very similar to that of Buteo borealis, the details of structure being exactly the same, the only differences being slight ones of contour. Its upper portion is more depressed, presenting in this respect a closer resemblance to that of Asturina. A3TENOH UXICIXCTUS.. a. unicinctus, Teinminck. Falco unicinctus TEMM. PI. Col. i, 1824, pi. 313. Morphnus unicinctus LESS. Man. i, 18* 28, 90. Astur unicinctus Cuv. Reg. An. i, 1829, 322- GRAY, Gen. i, 1849, 27.- KALP, Contr. Orn. 1850, 66.- STRICKL. Orn. Syn. i, 1853, 221 ( in part). Wins unicinctus LESS. Traite", 1831, 61. Buteo unicinctus GRAY, List Ace. B. M. 1844,18; Hand List, i, 1889,7. Hypomorphnn* unicinctus CABAX. Arch. f. Naturg. 1844, 263; Faun. Per. 1844, 17,85. Spisageranus unicinctus KAUP, Mas. Senck. iii, 1845, 260.- SCL. P. Z. S. 1860,288. Craxirex unicinctus BONAP. Rev. et Mag. Zool. 1854. 537.- ORTON, Am. Nat. 1871, 624 ( Quito Valley). Aiturina unicincta BuRM. Th. BraOi, 1855, 82; Reis. La Plata- St. ii, 1861, 436.- SCXIL. Mus. P.- B. Astnrinoe, 1862, 2. Urubitinga unicincta LAFR. R. Z. 1849, 99.- SCL. P. Z. S. 1858. 150.- PELZ. Orn. Bras. if 1868, 3, No. 10; iv, 1871, 2, 394.- SCL. & SALV. P. Z. S. 1868, 143 ( Buenos Ayres); ib. 175, 570 ( Peru); Norn. Neotr. 1873,119 ( part). ' The publication of this name was the result of an unfortunate oversight of the printer* in correcting from the last revised proof- sheets.- R. R. |
