2l6 



Heredity and Eugenics 



nent, are not pathological, and the individuals possessing 

 them are by no means weaklings, which has been shown in 

 the case of L. pallida (Fig. 73^), which was produced in 

 considerable numbers as a variation of L. decemlineata Say, 



Fig. 73. — Some divergent types of beetles produced by subjecting the germ 

 cells to external influences. A, normal decemlineata. B, the form pallida. C, 

 tortuosa. D, defecto-punctata. 



in some of my earlier cultures. This modification represents 

 definitely a decrease in the pigmentation values of the organ- 

 ism, with slight changes in bodily proportions, punctation, 

 habits, etc. It arises by subjecting the organism to rigor- 



