DETERMINATION OF DOMINANCE. 69 



the same type without the least trace of separation into categories, 

 and with the same low range of variability. When again inbred, 

 they gave in 7% the same type without the least trace of the 

 attributes of the male parent stock. Altogether I have repeated 

 this experiment six times with identical results. All have been 

 carried to F 3 and some of them to F 5 and F e . In the plate which 

 accompanies this correction is shown the behavior of F\ and TV 

 On page 295, line 25, for Ex. No. H. 410 read Ex. No. H. 411 



Throughout the paper the references are to Ex. No. H. 411 

 instead of H. 410. 



The description and plate of Ex. No. H. 410 are correct as 

 are the conditions of experiment as far as given. This experi- 

 ment, however, is from a second series of cultures parallel to 

 the one given, but in which there are other factors involved, 

 which in H. 410 are productive of a typical Mendelian behavior. 

 I do not at this time care to make any statement of what these 

 factors are, nor of their relation to the behaviors given in the 

 H. 409, H. 411, H. 409/11 series which are the simplest and most 

 easily presented series obtained in the crossing of L. signaticollis 

 and L. diver sa. 



DEPARTMENT OF ZOOLOGY, 



THE UNIVERSITY OF CHICAGO, 

 December 10, 1910. 



