428 
U. S. P. B. E. EXP. AND SUEVEYS—ZOOLOGY—GENEEAL EEPOET. 
Immature and young specimens are intermediate in color. 
The hill of this species is much more compressed and slenderer than .in C. americana. The 
wings are more pointed ; the claws larger. The white hands on the wing distinguish the two 
in all stages. 
List of specimens. 
Catal. 
No. 
Sex. 
Locality. 
When collected. 
Whence obtained. 
Collected by— 
Length. 
Streich 
of wings. 
Wing. 
5793 
5802 
2882 
10228 
8965 
8964 
3 
9 
9 
Philadelphia, Pa_ 
Jan. —,1856 
Acad. Nat. Scien. 
C. Drexler_ 
Pennsylvania - ...... 
November _ _ _ 
_do_ 
Laramie peak, Neb.. 
Laramie peak ?_ 
Aug. 25,1857 
Lt Warren. 
Dr. Hayden_ 
6. 50 
10. 25 
3.38 
AEGIOTHUS, Cab an is. 
Jlcanthis, Bonap. Conspectus, 1850, not of Bechstein, 1802, nor Keys. & Bias. 1840. 
Jlegiothus, Cabanis, Mus. Hein. 1851, 161. Type Fringilla linaria, Linn. 
Bill very short, conical, and acutely pointed, the outlines even concave ; the commissure straight; the base of the upper 
mandible and the nostrils concealed by stiff, appressed bristly feathers ; middle of the mandible having several ridges parallel with 
the culmen. Inner lateral toe rather the longer, its claw reaching the middle of the middle claw ; the hind toe rather longer, 
its claw longer than the digital portion. Wings very long, reaching the middle of the tail; second quill a little longer than the 
first and third. Tail deeply forked. 
The specimeus before me do not indicate more than one species, A. linaria , although the A. 
canescens of Greenland, in all probability, is found in Northern America. 
Comparative measurements of species. 
Catal. 
No. 
Species. 
Locality. 
Sex. 
Length. 
Stretch 
of wings. 
Wing. 
Tail. 
Tarsus. 
Middle 
toe. 
Its claw 
alone. 
Bill 
above. 
Along 
gape. 
Specimen 
measured. 
9224 
6.20 
4.50 
3 36 
0 84 
0 82 
0 94 
0 46 
0 54 
3701 
7.10 
4.28 
3.04 
0.80 
0.82 
0 24 
0 44 
0 54 
900 
3 
5.20 
3 04 
2.72 
0.55 
0.56 
0.22 
0.34 
0.44 
5.50 
9.00 
3.08 
7109 
.do. 
. 
5.12 
2.94 
2.49 
0.58 
0.56 
0 04 
0 36 
n 44 
902 
9 
4.90 
2.72 
2.38 
0.54 
0.50 
0.21 
0.35 
0.42 
5.00 
8.42 
2.75 
821 
.do. 
”'4.92 
2.82 
2.58 
0.54 
0.50 
0.20 
0.33 
0.38 
5.50 
8.50 
2.83 
8883 
5.00 
2.86 
2.58 
0.60 
0.50 
0.20 
0.38 
0.40 
AEGIOTHUS LINAKIA, Cabanis. 
Lesser Red Poll. 
Fringilla linaria, Linn. Syst. Nat. I, 1766, 322.—Aud. Orn Biog. IY, 1838, 538 ; pi. 375. 
Fringilla ( Acanthis) linaria, Keys. & Blas. Wirb. Europ. 1840, No. 115, page 161. 
Acanlhis linaria, Bp. Conspectus, 1850, 541. 
Jlegiothus linaria, Cabanis, Mus. Hein. 1851, 161. 
Linaria minor, Sw. F. Bor. Am. II, 1831, 267.— Aud. Syn. 1839, 114.— Ib. Birds Amer. Ill, 1841,122; pi. 179. 
