NER O2DsU Cr TORN: lix
abit the

112. LEADBEATERA GRATA.
Pl. 99. Heliodoxa Leadbeateri . : : : ; ‘ : : : : : ‘ i Woe We 1k G7.
Habitat. The hilly parts of New Granada.

- Pl. 93. It matters not where we place the single species of the genus Aithurus (Trochilus Polytmus in the body of the
work), since it offers no direct alliance to any one group. It is perhaps the most singular and most aberrant of

Humming-Birds : for it departs from all the rest in the form of its wings, the second quill-feather being the longest,

Shae while in all the others the first exceeds the rest in length : how different also are its other characters ! for instance,
are the tail is not forked in the usual way, the second feather being lengthened into flowing plumes, which apparently
oe tend more to add to its graceful appearance than to facilitate its aérial evolutions. The young males do not possess
genial this peculiarly formed tail ; and the females are so unlike both, that we should not have even suspected their alliance,

had we not positive evidence of it. This very isolated form is a native of Jamaica, and there alone is it found.
That so large a bird and so very marked a form should be confined to such a limited area is very surprising.
Genus Airnurus, Cad.
forked ; 113. AirHurus Potytmus.
7
-ounded Trochilus Polytmus . : ; 5 ‘ : : 3 : : : ; Vol. II. Pl. 98.

Cynanthus polytmus, Jard. Nat. Lib. Humming-Birds, vol. ii. p. 145.
Polyimus cephalatra, Bonap. Consp. Gen. Av. tom. i. p. 72, Polytmus, sp. 1.
Ib. sp. 2.; Trochilus stellatus, “ Gosse,” young male ?
. Pl. 94, Trochilus Maria, Hill, Ann. and Mag. Nat. Hist. ser. 2. vol. iii. p. 258, 1849 ; Gosse, Ill. Birds of Jamaica, pig.
Polytmus viridans, Reichenb. Aufz. der Col. p. 11; Id. Troch. Enum. p. 9, pl. 799. figs. 4858-60.
Aithurus polytmus, Cab. et. Hein. Mus. Hein. Theil iii. p. 50.

Habitat. Jamaica.

It will be seen that I have placed the Trochilus stellatus of Gosse as a synonym of Arthurus Polytmus ; at the same

ek time it is only justice to state that I have never seen a second specimen in a similar state of plumage, and it may be
another species. I make this remark with Mr. Gosse’s type specimen before me, it having been kindly presented
> form: to me by that gentleman.
s Helio- Genus TuHaturania, Gould.
(OadAw, vireo, et ovpavios, coelestis. )
If all genera were as well defined as that of Thalurania, the ornithologist would be far less perplexed than he
Bi frequently is with regard to the position of the species of which they are composed. All the members of this
Red extensive group are characterized by great elegance of contour, the bill, wings, and tail being well proportioned,
and in harmony with the size of the body; green and blue are the prevailing hues of the under-surface, while the
1 rather crown and throat, and sometimes the shoulders, are ornamented with blue. The females are less elegant in form,
and not so beautifully attired, all those parts which are green and blue in the males being, in every instance, I
believe, of a dull grey.
~ Pl. 96. The extent of country ranged over by the members of this group is very great: one, and one only, has been
found to the north of Panama; the remainder inhabit all the countries southward to the latitude of Rio de Janeiro.
114. THALURANIA GLAUCOPIS i : ‘ ; : : 3 : : ‘ i . Vol. II. Pl. 99.
Cynanthus glaucopis, Jard. Nat. Lib. Humming-Birds, vol. ii. p. 147. |
. Glaucopis frontalis, Burm. Th. Bras. tom. ii. p. 333.
Thalurania glaucopis, Cab. et Hein. Mus. Hein. Theil iii. pres:
Habitat. South-eastern Brazil.
115. THaLuRANIA WATERTONI . : : : : d : : ‘ : : : Vol. II. Pl. 100.
; wings Habitat. British Guiana; and Northern Brazil ?
Jer tail- 116. THALURANIA FURCATA . : : ; ; : ; : : : : Vol. II. Pl. 101.

Cynanthus furcatus, Jard. Nat. Lib. Humming-Birds, vol. ii. p. 148.
Thalurania Gyrinno, Reichenb. Aufz. der Col. p. 7.
Coeligena Gyrinno, Reichenb. Troch. Enum. p. 3, pl. 682. figs. 4500-1.

Fen (iil Thalurania furcata, Cab. et Hein. Mus. Hein. Theil iii. p. 24.