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Show 558 DR. O. FINSCH ON THE BIRDS OF TRINIDAD. [Julie 23, 15. CHAETURA POLIURA (Temm.) ; Buff. Pl. Enl. 726. f. 2. Acanthylis brachyura, Jard. Chcetura poliura, Scl. P. Z. S. 1865, p. 611 (syn. part.). Acanthylis poliurus, Leot. p. 86. Chcetura brachycerca, Scl. & Salv. P. Z. S. 1867, p. 758, t. 34 (opt.). One specimen, in every respect agreeing with the description and figure published recently by Dr. Sclater and Mr. Salvin from specimens sent from Eastern Peru, and supposed to belong to a new species. In comparing it with the description of A. brachyura, Jard. (Ann. and Mag. N . H. vol. xviii. 1846, p. 120), I was strongly inclined to believe in the identity of both "short-tailed Swifts;" but, unfortunately, Sir William Jardine does not mention the colour of the under tail-coverts. Being, therefore, unable to settle the question by means of positive evidence, I wrote to Dr. Sclater ; and he most kindly gave me the following answer:-"You are right in considering 0. brachycerca to be identical with C. brachyura, Jard.; I possess one of the Tobago specimens. But now I find that it is the true Cypselus 2ioliurus of Jamaica, founded on Buffon's Pl. Enl. 726. f. 2; so I call the species Chcetura poliura, while the Brazilian species must be C. cinereicauda, Cass."* C. poliura, as the species must be named, is easily distinguishable from the nearest allied species, G. cinereicauda, Cass., in having the upper as well as the under tail-coverts brownish grey; the tail-feathers darker, the shafts black, projecting about 1'"; the upper tail-coverts reach nearly to the end of the tail. Long. al. caud. culm. rict. tars. 4*' nlll \ii -\ltl 12.HI 41'** §111 Fam. CORACIAD^E. 16. PRIONITES SWAINSONI (Scl.). Prionites bahamensis, Sw. Momotus bahamensis, Leot. p. 96. Momotus swainsoni, Scl. Cat. p. 261; Taylor, Ibis, 1864, p. 88. One old specimen. Fam. TROGONID/E. 17. T R O G O N MERIDIONALIS, Sw.; Sclat. Cat. p. 276. Trogon sulphureus, Leot. (nee Spix), p. 101. Aganus violaceus (Gmel.), Cab. et Heine, Mus. Hein. iv. p. 190. Male and female, very accurately described by Dr. Leotaud. Long. al. caud. rostr. a from rostr. a rict. tars. 4" 4'" 4" 2"' 7'" 10!"' 5!'" (eS) 4 2 4 1 6i 10 5 (?) Dr. Cabanis notices the length of wing 4" 7"', that of tail 5" 2'" ; but Dr. Leotaud measures the wings also 4" 3'". * Cf. Mr. Sclater's remarks on this subject, antea p. 320.-En. |