NOTES AND LITERATV 



producing various local races. So long as 

 temperate regions, it did not come to differ r 

 world type; hut the form yozora Boisduv< 

 of Mexico and Central America, is very str 

 Even this last, however, has the genitalia 

 of genuine an/inlns. This case is especially 

 it indicates that an insect may spread ve 

 regions with exceedingly diverse climates, 

 materially in the characters of the genital' 

 we remember how frequently allied species 

 the same or similar regions, arc separable by 

 it seems that these are little or not at all co 

 environmental factors. To say that genitf 

 due to "mutation" does not really explain 



