Heredity in six families of Pcqnlio dardanus. 445 



where they are small. So also with the subniarginal 

 spots which vary with but also independently of the chief 

 spots (l)-(5). Thus the apical spot (8) may be absent 

 when (l)-(5) are small, as in Fig. 14, or when they are 

 large, as in Fig. 19. But upon the whole it tends to be 

 well developed when (l)-(5) are also well developed, as 

 in Figs. 15-18, etc. 



This kaleidoscopic combination of the various elements 

 in a pattern, added to the existence of undoubted 

 hereditary tendencies in the associations as well as in 

 the individual components, enables us to understand how 

 the complex detail of these mimetic patterns has been 

 attained. 



This most valuable and interesting material, which we 

 owe to the skill and energy of Mr. G. F. Leigh, F.E.S., thus 

 throws a flood of light upon two difficult and fascinating 

 problems — the proportions of the mimetic forms to those 

 of their particular models in each locality, and the more 

 fundamental problem of the adjustment of the details of 

 the mimetic patterns to those of the models. 



Explanation of Plates XXIII, XXIV. 



[See Explanation facin<j the Plates.] 



