102 
tion of the two extremes as strictly climatic. It remains, therefore, for 
us to better class these variations as of an individual nature; and this 
stand-point is well borne out by the results of careful measurements of 
specimens from various localities in North America. The following- 
table of measurements shows conclusively that the variations in general 
size and relative proportions of the parts are purely individual. 
Measurements of thirty-nine specimens of Nisus Cooperi from various portions of 2sorth 
America. 
ADULT MALES. 
Wing. 
Tail. 
Culrnen. 
Tarsus. 
Middle toe. 
Catalogue No. 
Museum. 
Locality. 
9. 35 
8. 30 
0. 68 
2. 45 
1. 55 
10086 
National Museum 
7 
9. 40 
8. 30 
0. 68 
2. 50 
1. 55 
2554 
It. R. 
Washington, D. C. 
9. 20 
8.15 
0. 65 
2. 55 
1. 50 
66237 
National Museum. 
Massachusetts. 
9. 30 
8. 15 
0. 60 
2. 45 
1. 50 
6874 
_do. 
Sacramento Valley, Cal. 
9.10 
■ 8.20 
0. 65 
2. 60 
1.50 
12024 
.... do . 
Fort Tejon, Cal. 
8. 85 
7. 80 
0. 65 
2. 40 
1. 45 
42074 
_do. 
Mirador, Mexico. 
Q 40 
8 10 
2. 30 
23809 
_do. 
Do. 
8. 90 
8! 00 
0. 62 
2. 45 
1. 85 
5841 
_do. 
Puget Sound. 
9. 25 
8. 60 
0. 60 
2. 35 
1. 55 
1593 
Aiken . 
El Paso, Co., Colo. 
9. 20 
8. 00 
0. 65 
2. 65 
1.60 
a. 15 
Lawrence. 
New York. 
9. 10 
7. 90 
0. 65 
2. 35 
1. 65 
b. 15 
_do. 
Do. 
ADULT FEMALES. 
10. 80 
9. 00 
0. 75 
2. 65 
1. 85 
26588 
National Museum. 
Washington, D. C. 
10. 50 
9. 00 
0. 80 
2. 85 
1. 85 
5792 
_do. 
South Carolina. 
10. 40 
9. 40 
0. 75 
2. 70 
1.75 
49683 
_do. 
Arizona. 
10.10 
9. 30 
0. 75 
2. 65 
1.60 
55018 
.... do ••••••• 
Mazatlan, Western Mexico. 
10. 35 
9. 40 
0. 70 
. 2.80 
1.70 
57867 
_do. 
Tehuantepec, Southern Mexico. 
10. 20 
9.10 
0. 70 
2. 60 
1. 62 
1612 
Aiken. 
Colorado. 
10. 00 
9.10 
0. 70 
2. 70 
1.62 
1654 
_do. 
Do. 
YOUNG MALES. 
9. 40 
8. 20 
0. 65 
2. 65 
1.55 
25201 
National Museum. 
Washington, D. C. 
9.25 
8. 90 
0. 65 
2. 65 
1. 65 
58340 
_do. 
Jacksonville, Fla. 
9.15 
8. 60 
0. 60 
2. 65 
1. 60 
55498 
_do. 
North Carolina. 
8. 90 
8. 30 
0. 60 
2.60 
1.50 
19117 
_do. 
Wyoming Territory. 
9. 00 
8. 80 
0. 60 
2.30 
1.45 
5165 
....do ••••<•*•••••■ 
Dakota Territory. 
9. 10 
8. 60 
0. 60 
2. 45 
1. 45 
5847 
_do. 
Washington Territory. 
8. 70 
8. 35 
0. 60 
2.40 
1. 45 
4590 
_do. 
Do. 
8. 90 
8. 50 
0. 60 
2. 40 
1. 50 
1759 
E. It. 
Nevada. 
9. 00 
8. 30 
0. 60 
2. 50 
1. 50 
National Museum. 
Fort Tejon, S. Cal. 
9. 00 
8. 40 
0. 60 
2. 55 
1. 52 
628 
E. E.. 
Cape St. Lucas. 
9. 30 
8. 30 
0. 60 
2. 50 
1. 40 
17208 
National Museum 
Do. 
8 90 
8. 00 
0. 60 
2. 40 
1. 50 
17209 
.... do ■ •••••• •••••• 
Do. 
9. 45 
8. 80 
0. 60 
2. 45 
1. 50 
42073 
_do. 
Mirador, Eastern Mexico. 
9 15 
8. 40 
0. 58 
2. 35 
1. 45 
33554 
_do. 
Do. 
8 80 
8. 70 
0. 60 
2. 45 
1. 50 
32500 
_do. 
Orizaba, Mexico. 
9. 15 
8. 80 
0. 55 
2. 45 
1. 48 
C. E. A. 
El Paso County, Colorado. 
YOUNG FEMALES. 
10 00 
9. 00 
0. 72 
2. 70 
1.70 
38255 
National Museum. 
Nebraska. 
10. 70 
9. 80 
0. 75 
2. 85 
1.80 
60868 
....do . 
Southern Illinois. 
10. 60 
10. 00 
0. 80 
2. 85 
1. 85 
955 
E. E. 
Do. 
10 50 
9. 80 
0. 70 
2. 70 
1.65 
17510 
National Museum. 
Montana Territorv. 
lol 50 
9. 80 
0. 70 
2. 65 
1. 65 
28114 
_do. 
Northern California. 
