FLORISUGA MELLIVORA. Jacobin. Trochilus mellivorus, Linn. Syst. Nat., tom. i. p. 193.—Gmel. Edit.. tom. i p- 499.—Borowsk tom. i. p. 159.—Lath. Ind. Orn., tom. i. p-310.—Jard. Nat. Lib. vol. 1. p. 189. pl. 30. White-bellied Humming-Bird, Edw. Glean., pl. 35. fig. 1. Ib. Gen. Hist., vol. iy. p- 324. La Jacobine, Buff. Pl. Enl. 640. fig. 2.—Ib. Hist. des Ois., tom. vi. p. 34. L’ Oiseau mouche & collier, dit La Jacobine, Aud. et Vieill. Ois. dor., tom. i. p- 55. pl. 23. La Jacobine variée, Aud. et Vieill. Ois. dor., tom. i. p- 56. pl. 24. Humming Birds, Lath. Gen. Syn., vol. ii. p. 705.— Whate-collared Humming-Bird, Shaw, Gen. Zool., vol. viii. p. 320. Mellisuga Surinamensis torquata, Briss. Orn. tom. iii. p: 713.—Ib. 8yv tom. iv. t. 406. fig. 1. —_—_— Surinamensis, Steph. Cont. of Shaw’s Gen. Zool., vol. xiv. p- 243. Ornismya mellwora, Less. Hist. Nat. des Ois., p- 90. pl. 21 male, pl. 22 female. Topaza mellivora, Gray and Mitch. Gen. of Birds, vol. i. p- 110, Topaza, sp. 6. Florisuga mellivora, Bonap. Consp. Gen. Av., p. 73. Trochilus fimbriatus, Linn. Syst. Nat., tom. i. p. 493.—Lath. Ind. Orn., tom. i. p- 312. Mellisuga Cayenensis gutture nevio, Briss. Orn., tom. iii. p. 706. pl. xxxvi. fig. 2.—Ib. 8vo. tom. 1. p. 33. Oiseau-mouche a gorge tachetée, Buff. Hist. des Ois., tom. vi. p. 31.—Pl. Enl. 276. fig. 2.— Aud. et Vieill. Ois. dor., tom. i. p. 53. pl. 22. Spotted-necked Humming-Bird, Lath. Gen. Syn., tom. ii. p: 772.-lb. Gen. Mist., vol:iv, pad2s. Whate-collared Humming-Bird, both var., Shaw, Gen. Zool., vol. viii. p. 321. Topaza fimbriata, Gray and Mitch. Gen. of Birds, vol. i. p. 110, Topaza, sp. 7. o. tom. u. p. 35.—Gerin., Tuts species is one of the most widely diffused of the Zrochitde with which I am acquainted ; it is also one of the oldest known, and consequently one of the species most abundant in our collections: I have specimens from Guiana, Trinidad, Cayenne, Sta Fé de Bogota and Peru; and Mr. Wallace, who is seeking Humming-Birds expressly for my work, has lately sent numerous specimens of both sexes from Cobati and Guia on the Upper Rio Negro,—a tolerable evidence that the species ranges over all the districts lying between the distant countries of Cayenne and Peru. It appears to be better adapted for low and fluviatile countries than for those of a more elevated character; for Mr. Wallace, writing from the Rio Negro, says, ‘‘ Although I have come seventeen hundred miles from Para into the interior of the country, I am not more than one or two hundred feet above the level of the sea.” It is much to be regretted that no account whatever has been recorded of its habits, &c. A great diversity exists in the colouring of this species, and much has yet to be learnt as to the changes to which it is subject ; examples, apparently adult, have in some instances the head and neck intense blue, while in others the same parts are strongly tinged with green: I also have specimens in which the blue colouring is interrupted by a mark of rufous extending down the sides of the neck; and others, the sex of which has been ascertained by dissection to be feminine, which have a considerable amount of blue pervading the throat, and only a trace of the white nuchal band; while others again are characterized by the mottled dress represented in the lower figure of the accompanying Plate : the colouring of the tail presents a still greater diversity, varying from a pearly white, with a narrow edging of (sess brown, to a dark bronzy green, with a brownish black band towards the extremity, and the outer feathers broadly tipped with white. His Excellency Lord Harris, Governor of T rinidad, has 7 e Zoological Society of London; and his Lordship has kindly promised s government he will pay considerable attention to the natural history of and communicate the result of his observations for the enrichment ’ lately brought fine examples from thence to this country and presented them to th that on his return to the seat of bi the Trochilide whabiting that fine island