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the balance, their tiny bodies must be weighed by grains.

in the scale of nature is certain, from the number both of species and individuals :

over

species, however (the P. Adolphi), they all fly to the southward of the
the insects taken by these diminutive birds, how perfect must be their
their

in colour they are as nearly alike as possible.

(NTR ODU CIrON

PHAETHORNIS SUPERCILIOSA.

Phaéthornis Pretrei : : : i
Polytmus Cayanensis longicaudus, Briss. Orn. toms iil. p. 686, 13, tab. 39. fig. 5.
Trochilus superciliosus, Linn. Syst. Nat. tom. 1. p. 139

p- 116; “Licht.” Nordm. Erm. Reis. Atl. p. 2, 16.
_____ Pretrei, Delatt. et Less. Rev. Zool. 1839, p. 20.

cee ates ee * 708,
brasiliensis, Cab. in Schomb. Reis. Guian. tom. 11. p. 70:

i ra@tornis j 35; Bonap. Consp. Gen. Av. tom. i.
Phatornis Pretrei, Gray, Gen. of Birds, vol. i. p. 104, Phatornis, sp. 16, pl. 35; I I

p- 68, Phaétornis, sp. 19.
Trochilus affinis, Natt. in Mus. Vindob.
Phathornis affnis, Pelzeln, Sitz. Acad. Wien, 1857, p. re
Phaéthornis superciliosus, Cab. et Hein. Mus. Hein. Theil ii. p. 9.
Habitat. Eastern Brazil. |
As in the case of P. malaris, the above list of synonyms is given on the authority of Dr. Cabanis.
PHAETHORNIS AUGUSTI. . : : : : : : :
Phatthornis Augusti, Reichenb. Aufz. der Col. p. 14; Id Troch. Enum. p. 12.

Habitat. Venezuela.

PHAETHORNIS SQUALIDA.
Phaéthornis intermedius. : d é 5 : : : : WAQE WARE Sit),
Trochilus squalidus, “ Natt.’’ Temm. Pl. Col. 120. fig. 1; Less. Man. d’Orn. p. 289 ; Id. Hist. Nat. des. Col. p. 40,
pl. 8; Id. Traité d’Orn. p. 289 ; Jard. Nat. Lib. Humming-Birds, vol. il. p. 125.
intermedius, Less. Troch. p. 65, pl.19; Jard. Nat. Lib. Humming-Birds, vol. ii. p. 123.
leucophrys, “ Licht.”” Nordm. Erm. Reis. Atl. p. 2, 18.
Phathornis squalidus, Jard. Nat. Lib. Humming-Birds, vol. ii. p. 151; Bonap. Consp. Gen. Av. tom. i. p. 68, sp. 11;
Burm. Th. Bras. tom. i1. p. 325.
intermedius, Jard. Nat. Lib. Humming-Birds, vol. ii. p. 150; Gray & Mitch. Gen. of Birds, vol. i.
p. 104, sp.8; Bonap. Consp. Gen. Av. tom. i. p. 67, Phaétornis, sp. 8.
leucophrys, Gray & Mitch. Gen. of Birds, vol. i. p. 104, sp. 4.
brasiliensis, Gray & Mitch. Gen. of Birds, vol i. p- 104, sp. 10.
Ptyonornis intermedia, Reichenb. Aufz. der Col. p. 14; Id. Troch. Enum. Dp. 12:
Phaethornis squalida, Cab. et Hein. Mus. Hein. Theil iii. p. 8.

Habitat. South-eastern Brazil.
We now come to that section to which Bonaparte gave the generic name of Pygmornis.

Genus Pyemornis, Bonap.
As the term implies, these birds are all extremely diminutive ; so minute, indeed, are they, that, if subjected to
That these mites of birds perform some important office
they are very widely dispersed
every part of the great country which is inhabited by this extensive family of birds ; with the exception of one
Isthmus of Panama. How minute must be

vision, and how delicately sensitive must be
tongue !

The only external differenc Pe
? é ence between the sexes consists 50 ¢ as : :
y een the sexes consists in the longer and more graduated tails of the females ;

34. PyGmornis LoNGUEMAREI.

Phaéthornis Loneuemareus

rochtlus 4 z “pre an Te : . - 6
’ onguemareus, Jard. Nat. Lib. Humming-Birds, vol. i

L ¢ l. p. 126; Cab. in Schomb. Reis. Guian.
tom. ll. p. 709.
:
Phethornis Longuemareus, Jard. Nat. Lib. vol. ii. p.151
Pygmornis Longuemarei, Cab. et Hein. Mus. Hein. TI

reil iii. p. 7, note.
Hahitat. Cayenne, :

Guiana, Trinidad, ; EV:
a, Trinidad, and the eastern part of Venezuela.

, i , : Vol, 2. Plo 98;

Lath. Ind. Orn. tom. i. p. 302; Wied, Beitr. tom. iy.

Vol.T. Pl 29,