MONTANA 



S OKLAHOMA VIRGINIA 



WASHINGTON 

 OREGON 



;! kansas west virginia 

 northern' 



3 

 CENTRAL |END, 



ARIZONA <AS ARKANSAS 



17.5 



17.0 



16.5 



16.0 



15.5 



15.0 - 



T 



T 



MALE 



FEMALE 



¥ 



NUMBER OF SPECIMENS 



IN SAMPLE 

 OBSERVED RANGE 

 OBSERVED MEAN 



2 STANDARD ERRORS d 

 EITHER SIDE OF MEAIj 



17.5 



17.0 



- 16.5 



16.0 



15.5 



15.0 



-• 14.5 



— 2 STANDARD DEVIATION 

 ON EITHER SIDE OF M^ 



LEGEND I 



Figure 17. — Gilecotus mexicanus 

 t. 



