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Show 364 MESSRS. SCLATER A N D SALVIN [May 27 12. CENTURUS ALBIFRONS (SW.). Picus albifrons, Sw. Phil. Mag. 1827, i. p. 439 ; Sund. Pic. p. 52 Cab. Journ. f. O. 1862, p. 324. Centurus santacruzi, Bp. P. Z. S. 1837, p. 116; Sclater, Cat. A. B. p. 343. W e have hitherto called this species by Bonaparte's name; but there can be no doubt that, as pointed out by Cabanis, it is the P. albifrons of Swainson. It is common in Southern Mexico and Guatemala. 13. BUTEO ELEGANS, Cassin ; Baird, B. N. A. p. 28. Mr. le Strange's collection contains a single skin of this Buzzard, agreeing with Texan specimens collected by Mr. Dresser. We have also seen an example of it in a collection recently sent to M. Salle from Orizava by M. Botteri. 14. ORTALIDA VETULA, Wagler, Isis, 1830, p. 1112, et 1832 p. 1227; Sclater, P. Z. S. 1859, p. 391. O. poliocephala, Sclater, P. Z. S. 1856, p. 310. Mr. le Strange's collection contains a single skin of this Ortalida, which he found " very common" in the tierra caliente of the Atlantic. He shot many on the road to Tampico, in April 1866. W e believe that the Texan bird called by the American ornithologists O. vetula, O. poliocephala, and 0. maccalli is probably referable to this species. 15. ORTALIDA POLIOCEPHALA, Wagler, Isis, 1830, p. 1112, et 1832, p. 1227. Two skins of this species, in Mr. le Strange's collection, are the first we have met with. It is immediately distinguishable from the preceding by its larger size, longer tail, whiter belly, and the much broader terminal bands of the tail-feathers, which are fulvous and not pure white. 2. Notes on the Species of the Genus Micrastur. By P. L. SCLATER, M.A., Ph.D., F.R.S., and OSBERT SALVIN, M.A., F.L.S. As in case of the Asturinee, to which we have lately called Society's attention*, some of the members of the genus Micrastur are at present in a state of great confusion. We trust that the following remarks may serve to render the species of the group with which we are acquainted more readily distinguishable. The genus Micrastur, established by Mr. G. R. Gray in 184If * See P. Z. S. I860, p. 129. t List of Genera of Birds, p. fi. |