1 90 Heredity and Eugenics 



All the indi\iciuals were allowed to remain in the colony, and 

 interbred freely in August, giving early in September a second 

 generation, of which the following census was made : 



A B i: D E 



46 10 1 c)0 I, J 1)2 -"lO 



These hibernated during the winter of 1905-6, and were not 

 seen again until September, 1906, in the fourth hybrid 

 generation of the culture. At this time the dominant form 

 was manifesth' a combination between L. deccmUneata, 

 L. oblongata, and L. midtilacniata, with the oblongata- 

 deccmlincata attributes in excess of those of L. miiltitaeniata 

 (a combination between classes D and E of F, and F,) : 



A B C D E 



7 25 12 2.210 



The huge preponderance of this complex type, which 

 was neither one nor the other of the three species, suggests 

 at once, of course, that the results could not be due to any 

 selective process, because the t}pe was not one of the 

 original t\i3es but a hybrid complex. 



The wintering conditions of 1906-7 were especially 

 rigorous, at least as judged by the number of beetles that I 

 found in that location in 1906-7, when the following census 

 was made: 



ABODE 



004 422 



This shows that during the wdnter practically only the 

 hybrid combination was able to survive. These repro- 

 duced and gave a progeny in July, 1907. An inspection 

 was made early in August, when I found only the dominant 

 tvpe present in the fifth hybrid generation. 



A B C I) E 



o o o 1.877 



The culture was not seen again until the spring of 1908, 

 when a considerable number of the dominant form of the 



