558 DR. 0. FINSCH ON THE BIRDS OF TRINIDAD. [June 23, 
15. Cua#rura potrura (Temm.); Buff. Pl. Enl. 726. f. 2. 
Acanthylis brachyura, Sard. 
Chetura poliura, Scl. P. Z. S. 1865, p. 611 (syn. part.). 
Acanthylis poliurus, Léot. p. 86. 
Chetura 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. drachyura, Jard. (Amn. 
and Mag. N. H. vol. xviii. 1846, p. 120), I was strongly inclined to 
believe in the identity of both “short-tailed Swifts ;”’ but, unfortu- 
nately, 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 C. bra- 
chycerca to be identical with C. brachyura, Jard.; I possess one of 
the Tobago specimens. But now I find that it is the true Cypselus 
poliurus of Jamaica, founded on Buffon’s Pl. Enl. 726. f. 2; so I 
call the species Chetura 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, C. 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. 
TALL moyi att ai Hit 
4 d LATE Me 43 vo 
Fam. Coractap&. 
16. Prionires swarnsoni (Scl.). 
Prionites bahamensis, Sw. 
Momotus bahamensis, Léot. p. 96. 
Momotus swainsoni, Scl, Cat. p. 261; Taylor, Ibis, 1864, p. 88. 
One old specimen. 
Fam. TRoGoONIDa. 
17. TROGON MERIDIONALIS, Sw.; Sclat. Cat. p. 276. 
Trogon sulphureus, Léot. (nec Spix), p. 101. 
Aganus violaceus (Gmel.), Cab. et Heine, Mus. Hein. iy. p. 190. 
Male and female, very accurately described by Dr. Léotaud. 
Long. al. caud. rostr. a fron. rosty. a rict. tars. 
4 4 4 out Via 103!" 5aMt (Ss) 
4 2 4 1 63 10 5 (2) 
Dr. Cabanis notices the length of wing 4" 7!"', that of tail 5! 2"; 
but Dr. Léotaud measures the wings also 4! 3!’ 
* (Cf. My. Sclater’s remarks on this subject, wtéa p, 829.—Ep. 
“siren 

