572 U. S. P. B. K EXP. AND SURVEYS ZOOLOGY — GENERAL REPORT. 
Detailed measurements. 
Bi 
I— 
Succession of quills from longe 
St. 
Catalogue numb 
T It 
oca i y. 
Stretch of wing 
Wing. 
Tail. 
Tarsus. 
Middle toe. 
The claw alone 
Along curve. 
On straight line. 
Gape. 
Height at base. 
1. 
2. 
3. 
4. 
5. 
6. 
7. 
8. 
Specimen measu 
4315 
Wellington, D. C- 
3 
15.50 
10.56 
1.84 
1.84 
0.53 
1.52 
1.42 
1.61 
0,56 
4 
3.5 
6.2 
7 
l 
Dry ... 
do. 
15.56 
31.50 
10.50 
Fresh . 
Dry... 
Dry , . . 
10314 
14.50 
10.30 
6.72 
1.93 
0.59 
1.64 
1.56 
1.60 
1.80 
0.59 
3 
4.5 
2 
6 
7 
l 
9 
10313 
do 
14.80 
10.7(1 
6.45 
1.84 
0.58 
1.80 
0.57 
3.4 
7 
3049 
Liberty county, Ga 
15.60 
10.44 
1.90 
0.63 
1.76 
1.60 
1.78 
0.58 
4 
3.5 
2 
6 
7 
8 
Dry ... 
2849 
do 
Q 
14.10 
9.911 
6.00 
1.71 
1.84 
0.54 
1.50 
1.42 
1.66 
0.57 
3.4 
5 
6 
7 
9 
1 
Dry . . . 
6530 
Indian Key, Fla.. 
3 
15.20 
10.40 
6.73 
1.80 
1.94 
0.64 
1.66 
1.58 
1.90 
0.57 
4 
3.5 
2 
7 
9 
Dry . . . 
do. 
33.00 
10.00 
List of specimens. 
Catal. No. 
Sex. 
Locality. 
When collected. 
Whence obtained. 
Stretch 
of wings. 
Wing. 
4515 
3 
Washington, D. C 
Feb. — , 1855... 
10313 
3 
10314 
3049 
S. F. Band 
2849 
6530 
Q 
3 
Feb. 3. 1857 
G. Wurdemann 
33.00 
10. 00 
PICICORVUS, Bonaparte. 
Picicorvus, Bonaparte, Consp. Av. 1850, 384. Type Corvus columbianus, Wils. 
Ch. — Lead color, with black wings and tail. Bill longer than the head, considerably longer than the tarsus, attenuated, 
slightly decurved ; tip without notch. Culmen and commissure curved ; gonys straight or slightly concave, as long as the tarsi. 
Nostrils circular, completely covered by a full tuft of incumbent white bristly feathers. Tail much shorter than the wings, 
nearly even or slightly rounded. Wings pointed, reaching to the tip of tail. Third, fourth, and fifth quills longest. Tarsi 
short, scarcely longer than the middle toe, the hind toe and claw very large, reaching nearly to the middle of the middle claw, 
the lateral toe little shorter. A row of small scales on the middle of the sides of tarsus. 
Without a specimen of Nucifraga conveniently at hand I cannot express exactly the difference 
"between it and the present genus. Judging from descriptions, however, the bill is more 
curved, the culmen heing decidedly convex ; the nasal feathers are longer ; the wings extending 
only to the middle of the tail, instead of near the tip. The very long wings distinguish it from 
all other American genera, except Corvus, which has a much thicker hill, &c, and is entirely 
black. The short tarsi and lengthened lateral and hinder toes are quite remarkable. The hind 
claw is rather longer than its digit. The sides of the tarsi exhibit the row of small scales seen 
in Corvus. The commissure is considerably curved, more convex than the culmen, which bends 
very gently throughout from the very base. There is a general approximation to the Sturnella- 
like bill more decidedly visible in Gymnokitta. The nostrils are small, with the anterior portion 
less deeply bevelled off than in Corvus. 
