THE YELLOW-RUMPED SISKIN.
Chrysomitris atratus. Cassin, Gilliss’s Expedition, ii. p. 181 (1855).
Chrysomitris xanthomeloena, Reichb. ? Journ, fur orn. 1855, p. 55.
Fringilla sp. ? Eyton, Cat. Birds, p. 256. No. 3211 (1856).
Chrysomitris uropygialis, Scl. Cat. Amer. Birds, p. 125 (1862).
Chrysomitris uropygialis, Cassin, Proc. Acad. Philad. 1865, p. 91.
Chrysomitris uropygialis, Scl. Proc. Zool. Soc. 1867, pp. 322, 338.
Chrysomitris uropygialis, Phil. Anal. Univers. Chile, xxxi. 1868, pp. 263, 295, 303, 316, 325, 329.
Chrysomitris xanthomeloena, Phil. ? Anal, Univers. Chile, xxxi. 1868, p. 325.
Fringilla xanthomeloena, Gray, ? Hand-List Birds, ii. p. 81 (1870).
Fringilla uropygialis, Gray, Hand-List Birds, ii. p. 81 (1870).
Chrysomitris uropygialis, Scl. et Salv. Nom. Av. Neotr, p. 34 (1873).
Fringilla uropygialis, Russ. Stubenvogel, p. 395 (1879).
Chrysomitris uropygialis, Tacz. Orn. Perou, iii. p. 54 (1886.)
English. Yellow-rumped Siskin. Cordillerean Goldfinch. Chilian Siskin. French. Le Tarin des Cordilleres.
German. Goldburzelzeisig. Kordilleren-Zeisig.
Castellano. Jilgeuro de la Cordillera.
Habitat. Chili, and Peruvian Andes.
Male. Head, chin, throat and back dull black ; feathers of nape, mantle, scapulars and great wing-coverts edged with yellowish-green ; wings blackish-brown, speculum lemon-yellow, first primary black ; tertials broadly edged with yellowish-white ; secondaries tipped with same ; rump, breast, belly, under-wing and tail-coverts and basal two thirds of tail bright lemon-yellow ; under side of wing pale yellow ; upper tail-coverts and rest of tail blackish-brown : iris dark brown ; bill dark slaty-brown, lower mandible paler ; legs blackish-brown : length 5.2, wing 3.2, tail 2.15, tars. 0.6, culm. 0.4.
Young Male. Similar, not so black, the yellowish-green edges of the feathers of the back broader and extending to the crown of head ; lower parts pale lemon-yellow ; a small elongated shaft-spot on the two longest under tail-coverts.
Female. Above dull blackish-brown ; darker on the chin and throat, the feathers of back more or less broadly edged with yellowish-green ; margins of tertials, speculum and centre of abdomen very pale yellow, inclining to white ; rest of under-parts and rump pale lemon- yellow ; two blackish elongated shaft-spots on the under tail-coverts : bill and legs as in the male.
Observ. The very young birds are almost green above, the forehead and chin blackish ; the broad yellow margins of the tertials and secondaries in many specimens of various ages are completely frayed away.
THIS very interesting species, which is so closely allied to Chrysomitris atrata, was first made known to science by Dr. P. L. Sclater in his ‘Catalogue of American Birds’ published in 1862, although well known to ornithologists prior to this date, it was not recognized as different from the young birds or females of Ch. atrata.
I have a specimen from Mr. Byton’s collection which must have been procured long before 1856, this example (an adult male) was still undetermined when it passed into my collection, and without doubt is one of Mr. T. Bridge’s specimens obtained in Chili, as I have one of his skins of Chrysomitris atrata which is prepared in the same manner.
Mr. J. Cassin also places this species (which was collected during ‘Gilliss’s Expedition’) under Ch. atrata, he says—“This little bird is stated to appear occasionally in flocks, though it probably visits Chili only in the season of migration : ” but in the ‘ Proc. Acad. Philad.’ 1865, he remarks that the “specimens from ‘Gilliss’s Exped. to Chili,’ now in the National Museum, were mistaken by me for the preceding (C. atratus,) having at that time only the young specimen from D’Orbigny’s collection, to which I above alluded, and relying on it for my determination of the species.” Dr. R. A. Philippi tells us that it “is known in the province of Santiago by the name of Jilguero de la Cordillera, and lives in the central Mountainous provinces extending its range into Peru.”
The series of specimens from which the principle part of the details are taken, is now in my own collection and were procured by Mr. Weishaupt in the mountains of Chili at an elevation of about 3,000 to 5,000 feet above the sea-level, where they are found in small flocks, keeping always to the great ravines, and feeding on the various wild grass and other seeds. At present I am unable to give any further details respecting its habits.
To reduce the number of species, I have placed Chrysomitris xanthomeloeua, Rchb. among the synonyms of this bird for the present. The plant is Porliera hygrometrica.
No. Sex. Mus. Locality. Length. Wing. Tail. Tars. Culm.
a Male E. B. Chili. (Weishaupt). 5.2 3.2 2.15 0.6 0.4
b Male E. B. Chili. (Weishaupt). 4.65 3.2 2 0.6 0.45
c Female E. B. Chili. (Weishaupt). 4.9 3.25 2 0.6 0.4
d Female E. B. Chili. (Weishaupt). 4.9 3.2 2 0.6 0.4
e Male E. B. Chili. (Weishaupt). 4.95 3.25 2.2 0.6 0.4
f Female E. B. Chili. (Weishaupt). 4.95 3.15 2 0.6 0.4
g Female E. B. Chili. (Weishaupt). 5.3 3.25 2.2 0.6 0.4
h Male E. B. Chili. (Weishaupt). 4.85 3.25 2 0.6 0.35
i Female jun. E. B. Chili. (Weishaupt). 4.95 3.2 2.1 0.6 0.4
j Male E. B. Chili. ? 4.9 3.2 2 0.6 0.4
k Male E. B. Chili. (Weishaupt). 4.75 3.1 2 0.6 0.4
l Female E. B. Chili. (Weishaupt). 4.5 3.15 2 0.6 0.35
The figures (Plate II) are taken from e and l.