NATURAL SCIENCES OF PHILADELPHIA. 
381 
Mas nupt. temp, uropygio rosaceo, pectore carmesino. 
Fem. et mas juv. pectore albido fusco-striato. 
Long. 5.25 poll. ; alar. lat. 9.00 ; ala .2.90 ; cauda 2.35 ; rostr. 0,35 ; tars. 
0.58 ; dig. med. 0.36 ; ung. 0.20. 
Habitat. Amer. Sept. bor. et orient. 
A detailed description of the present species, with the points in which it 
differs from the Unarms , has already appeared in the Proceedings of the 
Academy, as above, and there is consequently no necessity for giving them 
here. A comparison with the A. rostratus, and the differences from that spe- 
cies, will be found under the latter head. The following additional remarks 
may aid in elucidating the characters of the species. 
A small series of specimens from Moose Factory, Hudson’s Bay, differ 
slightly from the Labrador types in a more elongated bill. The bill, however, 
still preserves the stoutness, and the dusky color of the present species, and 
the other characters agree strictly with my original specimens. 
Several specimens have been received from Forts Resolution and Simpson, 
collected by Mr. Robert Kennicott, which agree in the most minute particulars 
with the Labrador types. Indeed, so far as we can judge from a series of 
twelve specimens from various localities in northern North America, the char- 
acters of the species are more constant than in any other of the genus, show- 
ing little or no tendency towards those of Unarms ^ from which there is not the 
slightest difficulty in distinguishing it. 
The figures given by Audubon in his 11 Linaria minor Ray,” come much nearer 
to the present species than to the A. Unarms. Moreover, we find in the col- 
lection two specimens which were received from Mr. Audubon, and which 
were quite probably the originals of the plate. The description, however, is 
undoubtedly that of the true Unarms. 
ASguothus rufescens (Vieill.) Cab. 
Fringilla linaria , Temminck, Man. Orn. 1835, 267. Nec Linn. Nec Temm. 
1820. 
Fringilla rufescens , Vieill., Faun. Franq. 83, tab. 41, fig. 1, fide Temm. Id. Diet. 
Nouv. 1817, xxxi. 342. 
Linaria rufescens , Bp. et Schl. Monogr. Lox. 1850, 50, tab. 54. 
u Linaria minor , Ray, Gould, Birds Eur. 1843, iii. tab. 194,” secundum Bp. et 
Schl. 
Linaria flavirostr is , septentrionalis , canigularis , Brehm, Vog. Deuts. sec. Bp. 
Linaria rubra Gesn.; L. minima Br. fide Bp. 
Linola linaria Bon. Comp. List, 1838, sec. Bp. 
Diag. A. FFgiotho linario simillimus, sed minor, (long. 4.50 poll.) et cauda 
breviore, vix bipollicari, uropygio plus minus rufescente, fusco-striato. Long. 
4 6-12 poll.; ala 2 6-12 ad 7 -12; caud. 2; rostr. 3J-12 ; tars. 5^-12; dig. 
med. 3 A-l 2. 
Ilab. Europ. 
The above diagnosis, taken chiefly from Bonaparte, is that of a European 
species, admitted by most modern ornithologists. Following the usual custom, 
we present it as distinct, though, it must be confessed, not without some doubts 
as to the entire propriety of such a procedure. The characters of the species, 
as given in. the diagnosis, certainly show very slight differences from the Una- 
rms. The distinctive features lie entirely in the smaller size, somewhat 
shorter tail, and, as the name indicates, a general reddish tinge, especially on 
the rump. But as is well known to be the case in this genus, the young of all 
the species have this reddish or yellowish suffusion; and in none is it more 
marked than in the Unarms. A specimen of Unarms from North America now 
before me, compared with a rufescens from Europe, has the rufous tinge every- 
where much stronger than in the European bird, especially on the rump. We 
1861.] 
