THRENETES LEUCURUS. 



White-tailed Barbed-throat. 



Trochilus leuctirus, Linn. Syst. Nat., vol, i. p. 190. — lb. Gmel. Edit., vol. i. p. 487. — Lath. 



Ind. Orn., vol. i. p. 307.— Less. Hist. Nat. des Col., p. 83. pi. 22.— Vieill. Ency. 



Meth. Om., part ii. p. 553. pi. 129. fig. 5.^ — Dumont, Diet, des Sei. Nat., torn. x. 



p. 52. — Drapiez, Diet. Class. d'Hist. Nat., torn. iv. p. 317. 

 Polytmas Surinamensis, Briss. Orn., vol. iii. p. 674. — Id. 8vo, vol. ii. p. 22. 

 Colibri a Collier rouge, BufF. Hist, des Ois., torn. vi. p. 59. — lb. PL Enl. 600. fig. 4. — Vieill. 



Ois. dor., torn. i. p. 128. 

 White-tailed Hummmg-Bird^ Lath. Gen. Syn., vol. ii. p. 757. — Edw., pi. 256. fig. 2. — Shaw^, 



Gen. Zool., vol. viii. p. 293.— Lath. Gen. Hist., vol. iv. p. 308. 

 Rufous-throated Hnmming-Bird, Lath. Gen. Hist., vol. iv. p. 308. 

 Polytmus leucuruSy Gray and Mitch. Gen. of Birds, vol. i. p. 108, Polytmus^ sp. 21. 

 Glaucis leucuruSy Bonap. Consp. Gen. Av., p. 67, Glaucis, sp. 2. 



That the present species was known to Linnaeus, and to most of the writers on Natural History who lived 

 prior to that great Naturalist, is quite certain ; yet at the present day how few are the examples of it to be 

 met with in the collections of Europe ! It is undoubtedly a native of Surinam and the neighbouring conti- 

 nental states ; and it is very surprising that so ornamental and well-marked a species should not have more 

 frequently attracted the collector's notice, and been sent home in abundance. Judging from the specimens 

 I have had opportunities of examining, there would appear to be little difference in the colouring of the 

 sexes. In its form and structure, this species offers, in my opinion, considerable affinity to the members of 

 the genus Glaucis, which also tenant the same regions, and display very similar habits. 



M. Bourcier tells me that it has also been sent from British Guiana, but that it rarely occurs in collec- 

 tions from Cayenne. 



Head, all the upper surface, upper wing-coverts, two central tail-feathers, sides of the neck, breast and 

 flanks, shining olive-green ; wings purplish brown ; lateral tail-feathers white, stained on the apical half of 

 the outer margin and the tip of the outer feather with dark brown ; a crescent of the same, but of a much 

 paler hue at the tip of the next ; a still fainter mark of the same colour near the tip of the external web of 

 the third, and a nearly obsolete mark of a similar tint in the same situation on the fourth ; lores and ear- 

 coverts brown ; on the chin and throat a lengthened triangular mark of black, bounded on either side by a 

 narrow line of greyish white, and below by a broad band of deep sandy buff crossing the throat ; centre 

 of the abdomen greyish buff; under tail-coverts olive, narrowly edged with greyish buff; bill black, 

 with the cutting of the upper mandible and the basal three-fourths of the under one pearly white ; feet 

 yellow. 



The figures are of the natural size. 



