568 U. S P. K. R. EXP. AND SURVEYS ZOOLOGY GENERAL REPORT. 
Detailed measurements of species. 
Bill— 
Succession of quills from longe 
! number. 
Locality. 
S 
ht line. 
' base. 
3. 
3. 
4. 
5. 
6. 
7. 
8. 
measured. 
o 
Catalo) 
8 
Lengtl 
1 
Tail. 
Tarsus 
Middle 
— 
< 
O 
cS 
Height 
Specim 
10092 
Washington, D. C. 
a 
18.80 
12.60 
7.81 
2.04 
0.57 
1.97 
2.09 
0.83 
4 
3,5 
6 
2 
7 
9 
1 
Dry . . . 
4358 
do 
3 
18.50 
12.90 
8.38 
2.32 
1.99 
0.62 
1.97 
1.87 
2.10 
0.78 
4 
3,5 
6 
3 
7 
9 
Dry ... 
do. 
20.00 
39.50 
n.oo 
Fresh . 
Dry... 
9994 
Tremont, III 
18.20 
11.70 
7.96 
2.42 
2.12 
0.60 
1.97 
1.82 
2.06 
0.78 
4 
3,5 
3 
7 
9 
6559 
Fort Riley, K. T... 
19.10 
13.30 
2.44 
2.02 
0.54 
2.02 
2.04 
2.24 
0.74 
4.5 
3 
6 
3 
7 
8 
9 
1 
Dry... 
5191 
Fort Union, Neb. .. 
17.20 
12.40 
7.83 
2.34 
1 93 
0.56 
1.84 
1.72 
2.04 
Dry ... 
Fresh . 
Dry ... 
do. 
10305: 
19.50 
36.00 
13.00 
Tulare Valley 
3 
18.30 
12.72 
7 83 
2.33 
0.54 
2.10 
2.02 
2.08 
0.80 
4 
3,5 
3 
7 
9 
10303: 
Ft.Vancouver,W.T. 
17.10 
12. 10 
7.74 
2.25 
1.90 
0.56 
1.80 
1.73 
1 99 
0.72 
4.5 
3 
6 
3 
7 
8 
9 
1 
Dry ... 
10304? 
Presidio, Cal 
18.20 
11.61 
7.48 
1.82 
0.60 
1.80 
1.76 
2.08 
0.75 
4 
3,5 
6 
7 
8 
9 
1 
Dry . . . 
List of specimens. 
Catal. 
No. 
Sex and 
age. 
Locality. 
When col- 
lected. 
Whence obtained. 
Orig'l 
No. 
Collected by— 
Length. 
Stretch 
of wings 
Wing. 
4358 
10092 
9994 
6919 
6559 
5192 
5191 
5190 
5189 
5188 
10305 
10304 
3 
Feb. 13, 1855 
20 
39.50 
Nelson river, H.B.T 
1857 
Q 
Oct. 25, 1856 
July 19, 1856 
Lieut. G. K. Warren 
Dr. Hayden 
19 
19.50 
37.00 
36.00 
12.50 
13.00 
o 
o 
o 3 
3 
Aug. 1, 1856 
Lieut. R. S. Williamson .. 
June 6, 1853 
July 15, 1853 
CORVUS AMERICANUS, var. FLORID ANUS, Baird. 
Florida Crow. 
S P . Ch — About the size of C. americcmus, but bill and feet larger. Tail less rounded. Third, fourth, and fifth quills nearly 
equal ; third rather longer than fifth. Color less violet above. Length, 19.50 ; wing, 12 ; tail, 7.70 ; tarsus, 2.60. 
Hah. — Southern peninsula of Florida. 
The reception of this bird, as the article on Corvus is going through the press, prevents any 
very elaborate criticism of its characters, but there are so many peculiarities in it as clearly to 
show that it is, if not a distinct species from the common crow, at least a very remarkable 
variety. Although perhaps rather smaller than the C. americanus, the bill and feet, especially 
the latter, are very considerably larger. The nasal feathers extend over the basal two-fifths of 
the bill instead of the half. The proportions of the bill are about the same ; in the Florida bird 
it is rather the longer. The greatest difference is in the feet. The tarsal joint of the tibia is 
bare, the feathers scarcely coming below it, even anteriorly, instead of projecting some distance. 
The tarsus is almost a quarter of an inch longer ; covered anteriorly by nine scutellae instead of 
