428 
U. S. P. R. R. EXP. AND SURVEYS — ZOOLOGY — GENERAL REPORT. 
Immature and young specimens are intermediate in color. 
The bill 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. 
Stretch 
of wings. 
Wing. 
5793 
5802 
2882 
10228 
8965 
8964 
3 
Q 
9 
Philadelphia, Pa 
Jan. —,1856 
Acad. Nat. Scien. 
do 
do.. 
Pennsylvania . 
do 
Nelson river, If. B. T. 
Laramie peak, Neb.. 
Aug. 25,1857 
Lt Warren 
do 
Dr. Hay den 
do 
6. 50 
10. 25 
3.38 
AEGIOTHUS, Cab a n is. 
Jlcanthis, Bonap. Conspectus, 1850, not of Bechstein, 1802, nor Keys. & Bias. 1840. 
Jlegiothus, Cabanis, Mus. Hein. 1851, 161. Type FringUla 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 specimens 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. 
gape. 
Specimen 
measured. 
9224 
3701 
aoo 
do. 
7109 
902 
do. 
821 
do. 
8883 
Leucostiete arctous?. .. 
Leueosticte tephrocotis. 
6.2(1 
7.10 
5.20 
5.50 
5.12 
4.90 
5.00 
4.92 
5.50 
5.00 
4.50 
4.28 
3.04 
3.08 
2.94 
2.72 
2.75 
2.82 
2.83 
2.86 
3.36 
3.04 
2.72 
0.84 
0.80 
0.55 
0.82 
0.56 
0.24 
0.24 
0.28 
0.46 
0.44 
0.34 
0.54 
0.54 
0.44 
3 
9.00 
Fresh.... 
Philadelphia, Pa — 
"q" 
2.49 
Q.38 
0.58 
0.54 
0.56 
0.50 
0.24 
0.21 
0.35 
0.44 
0.42 
8.42 
Fresh.... 

3 
2.58 
0.54 
0.50 
0.20 
0.33 
8.50 
Fresh.... 
2.58 
0.60 
0.50 
0.00 
0.38 
0.40 
AEGIOTHUS LINARIA, Cabanis. 
Lesser Red Poll. 
FringUla linaria, Linn. Syst. Nat. I, 1766, 322.— Aud. Orn Biog. IV, 1838, 538 ; pi. 375. 
FringUla (Jlcanthis) linaria, Keys. & Blas. Wirb. Europ. 1840, No. 115, page 161. 
Jlcanthis 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. 
