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 siiecimens 0/ Nisus CoopFjUI f7-om various portions of Ko7-ih 



America. 



ADULT MALES. 



a 



H 



p 

 



g 



Q 



C3 



6 



s 

 1 









 a 





 



Museum. 



Locality. 



9.35 



9 40 



8.30 

 8.30 

 8.15 

 8.15 

 8.20 

 7.80 

 8.10 

 8.00 

 8.60 

 8.00 

 7.90 



0.68 

 0.68 

 0.65 

 0.60 

 0.65 

 SfCS 



"""6." 62 

 0. GO 

 0. 05 

 0.05 



2.45 

 2.50 

 2.55 

 2.45 

 2.60 

 2.40 

 2.30 

 2. 45 

 2.35 

 2.05 

 2.35 



1. 55 

 1.55 

 1.50 

 1.50 

 1.50 

 1.45 

 1.55 

 1.85 

 1.55 

 1. 00 

 1. 05 



10086 



2554 



66237 



6874 



12024 



42074 



23809 



5841 



1593 



a. 15 



h. 15 



!N"ational Museum . 

 R. R 



Wasliiuo-ton D C. 



9.20 



. 9.30 



9.10 



^rational Museum. 



'....do 



do 



Mas.sacbusetts. 

 Sacrameuto Valley, Cal. 

 Fort Tejon, Cal. 



8. 85 



....do 



9.40 

 8 90 



....do 



do 



Do. 



9.25 





El Paso, Co., Colo. 



9.20 

 9.10 



Lawreuce 



....do 



New York. 

 Do. 



ADULT FEMALES. 



9.00 



0.75 



2.65 



1.85 



26533 



9.00 



0.80 



2.85 



1.85 



5792 



9.40 



0.75 



2.70 



1.75 



49683 



9.30 



0.75 



2.65 



1.60 



5.5018 



9.40 



0.70 



2.80 



1.70 



57867 



9.10 



0.70 



2.60 



1.62 



1612 



9.10 



0.70 



2.70 



1.62 



1654 



National Museum 



...do , 



...do 



...do 



...do 



Aikeu 



...do 



"Waslnngton, D. C. 

 South Carolina. 

 Arizona. 



Mazatlan, TVestern Mexico. 

 Tehuau tepee, Southern Mexico. 

 Colorado. 

 Do. 



TOUNG MALES. 



8.20 



0.65 



2.65 



1.55 



25201 



8.90 



0.65 



2.65 



1.65 



58340 



8.60 



0.60 



2.65 



1.60 



55498 



8.30 



0.60 



2.60 



1.50 



19117 



8.80 



0.60 



2.30 



1.45 



5105 



8.60 



0.60 



2.45 



1.45 



5847 



8.35 



0.60 



2.40 



1.45 



4590 



8.50 



0.60 



2.40 



1.50 



1759 



8.30 



0.60 



2.50 



1.50 





8.40 



0.60 



2.55 



1.52 



628 



8.30 



0.60 



2. .50 



1.40 



17208 



8.00 



0.60 



2.40 



1.50 



17209 



8.80 



0.60 



2.45 



1.50 



42073 



8.40 



0.58 



2.35 



1.45 



33.554 



8.70 



0.60 



2.45 



1.50 



32500 



8.80 



0.55 



2.45 



1.48 





National Museum 



...do 



...do 



...do 



...do 



...do 



...do 



R.R 



National Museum 



K.R 



National Museum 



...do 



...do 



...do 



...do 



C.E. A.., 



■Washington, D. C. 

 Jacksonville, Fla. 

 North Carolina. 

 "Wyomius Territory. 

 Dakota Territory. 

 "Washington Territory. 



Do. 

 Nevada. 



Fort Tejon, S. Cal. 

 Cape St. Lucas. 



Do. 



Do. 

 Mirador, Eastern Mexico. 



Do. 

 Orizaba, Mexico. 

 El Paso County, Colorado. 



TOUNG FEMALES. 



9.00 



0.72 



2.70 



1.70 



38255 



9.80 



0.75 



2.85 



1.80 



60868 



10.00 



0.80 



2.85 



1.85 



955 



9.80 



0.70 



2.70 



1.65 



17510 



9.80 



0.70 



2.65 



1.65 



28114 



^National Museum 



.-..do 



R.R 



N"ational Museum 

 ....do 



Nebraska. 

 Southern Illinois. 



Do. 

 Montana Territory. 

 Northern California. 



