112 



ILLINOIS BIOLOGICAL MONOGRAPHS 



[506 



PLATE XXI 



Explanation of Plate 



Figure 469. Showing the range of variation in the group of races included 

 under the name tranqucbarica Herbst. The classes of patterns are arranged in 

 a series a, b, c, d, c, f, etc., from left to right and the percentage of individuals 

 in each class for several localities is graphically represented. At the top is indi- 

 cated the color of the elytra to which the patterns belong but these do not fall 

 in the same classes as the patterns. The graphs are numbered and the localities 

 which they represent are numbered on figure 469a. 



The graphs are for the following localities, approximate, altitude, etc. 



Vegetation 



Altitude 



2020 ft. 



4500 ft. 



1060 ft. 



2600 ft. 



100+ ft. 



2500 ft. 



1500 ft. 



200 ft. 



1 180 ft. 



7536 ft. 



The classes into which they are divided are somewhat artificial and some of 

 the curves are divided. 



No. 

 1. 

 2. 

 3- 

 4- 

 5- 

 6. 



7- 

 8. 



9- 

 10. 



Locality 

 Las Vegas, Nev. 

 Provo, Utah 

 San Bernardino, Cal. 

 Hagerman, Idaho 

 Galveston, Tex. (vicinity) 

 Dodge City, Kan. 

 Fayetteville, Ark. 

 Framingham, Mass. 

 Avveme, Manitoba 

 Alamosa, Colorado 



