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Show 1870.] MR. O. SALVIN ON THE BIRDS OF VERAGUA. 203 indeed their growth is seldom quite symmetrical; and therefore this character cannot be relied on as specific in every case. As regards the colour, I notice the difference pointed out in some instances, but net in all; so that this character, too, is untrustworthy. It is true that the general tendency of the Costa-Rican race is to have shorter and narrower caudal plumes than the Guatemalan ; but this is all that can be said, and I do not think it possible to give unfailing characters by which the two races can be distinguished with certainty. 122. NYCTIBIUS JAMAICENSIS (Gm.) ; Scl. P. Z. S. 1866, p. 129. A fine specimen of this species agrees with Jamaican examples in Sclater's collection, but is somewhat smaller than the Guatemalan skin, whose dimensions are given by Sclater (/. c). Cabanis (J. f. Orn. 1S69, p. 314, note) seems to consider N. cornutus, Vieill., distinct from N. jamaicensis, but assigns no reasons. Sclater places the former name as a synonym of N. jamaicensis, and looks upon the Jamaican and continental birds as one and the same species. As the dimensions of several specimens are given in Sclater's monograph, I add the measurement of this specimen : long, tota 15*0, alse 11*0, caudae 80, lat. rostri 2*2. It will be seen that these measurements almost exactly correspond with those of one of the Jamaican skins before referred to. 123. CHORDEILES POPETUE, Vieill. Calovevora. A single skin agrees with North-American examples. The species likewise occurs at Panama (Scl. & Salv. P. Z. S. 1864, p. 364). 124. ANTROSTOMUS CAROLINENSIS (Gm.) ; Scl. P. Z. S. 1866, p. 136. V. de Chiriqui. Also found in Guatemala and Costa Rica, but not southward of the point here recorded. 125. ANTROSTOMUS SATURATUS, sp. n. cJ . Nigricans, rufo maculatus : alis nigris, extus solum rufo nota' tis, speculo atari nullo: subtus niger, rufescente transfasciatus, vitta gulari alba nulla, maculis albidis in medio ventre positis : cauda nigra rufo transfasciata : rectricibus tribus utrinque externis albo late terminatis, setis rictalibus longissimis: long. tota 8*5, alee 6*1, caudce 4*8. Hab. V. de Chiriqui (Arce). Obs. A. nigrescenti (Cab.) (Scl. P. Z. S. 1866, p. 138) affinis, sed rectricibus latiore albo terminatis, vitta quoque gulari et speculo alari absentibus, distinguendus. This species, although I have compared it to A. nigrescens, belongs to section A of the Antrostomi, according to Sclater's arrangement (I. c. p. 136), having no white bar nor markings of any sort on the wing, lt is of about the same size as A. nigrescens. The single skin sent does not show any white bar upon the throat but |
