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Show 1867.] MR. 0. SALVIN ON THE BIRDS OF VERAGUA. 141 able variation, hardly two specimens being alike; the same may be said of the extent of the same colour. (4) The black band varies very much in width, both it and the extent of the fulvous depending very much upon the way in which the skin is made up, and hence a character of doubtful value; two of the Veraguan specimens have scarcely any band, while the third has a broad one. (5) Guatemalan specimens are in general of a clearer cinereous colour below ; Costa Rican specimens hardly so much; Veraguan specimens are two of them tinged with fulvous, and one almost as cinereous as Guatemala skins ; both the male Panama specimens are quite like the Guatemalan. (6) The crissum of the Veraguan specimens is sliglitly darker than Guatemalan, not so the Panama. The fact of the matter is, that wherever Saltator magnoides is found it varies in some degree as regards a few minor points. If S. intermedius were admitted to rank as a species, we should have a number of specimens which might with equal propriety be assigned to either. None of our northern specimens have the sexes marked so that I can depend upon them ; hence the question as to the distinction between the sexes cannot be discussed. 57. SALTATOR ISTHMICUS, Sclater; Scl. & Salv. P.Z.S. 1864, p. 351. Saltator striatipectus, Lawr. Ann. N. Y. Lye. viii. p. 175. Santa Fe; David (Hicks). 58. PlTYLUS GROSSUS (L.). Santa Fe. 59. PlTYLUS POLIOGASTER, DuBllS. Santa Fe and Santiago de Veragua. 60. GUIRACA CONORETA, DUBUS. Santa Fe. At Panama the southern form of this Finch (G. cyanoides, Lafr.) occurs, showing that the Central American race has its range sharply defined, the present locality being its southernmost limit. 61. ORYZOBORUS FUNEREUS, Sclater. Santa Fe. A single specimen from this locality agrees accurately with our Guatemalan examples of 0. funereus and with Sclater's type. According to Mr. Lawrence the species of this form occurring on the Panama Railway is 0. cethiops, Scl. 62. SPERMOPHILA SEMICOLLARIS, Lawr. Santa Fe'. 63. SPERMOPHILA COLLARIS, Lawr. Ann. N. Y. Lye. viii. p. 176. David (Hicks'). |