Figures 224-248 



All figures life size. 



224-248. Malacosoma californician (central populations), showing four ex- 

 amples of variations in males and females that may be foiuid in specimens 

 from a single local population. This much variation. ho\vever, in specimens 

 reared from single colonies is almost never found. Males are generally more 

 variable than females. Specimens similar to those in columns 2, 3, and 4 are 

 much more common than those in columns 1 and 5 (except fig. 239). 

 224-228. Males, Lamoille Canyon, Ruby Mountains, Nevada. 

 229-233. Females, Lamoille Canyon, Ruby Mountains, Nevada. 

 234-238. Males, Sacajawea Camp, 24 mi. W. Big Piney, Sublette Co., 

 Wyoming. 



239-243. Males, Todd's Lodge, Oak Creek Canyon, Arizona. 

 244-248. Males, Big Springs Ranch, Florissant, Teller Co., Colorado. 



Note the large size of the males from Big Springs Ranch, Colorado, compared 

 with the other males. All specimens are field collected, so the larvae from 

 which these moths developed probably had adequate food in good condition. 

 This suggests that in Malacosoma, as in other organisms, local populations of 

 the same species may evolve different body sizes. 



233 



