Eeactions and Products in Inteespecific Crosses 



127 



the types with a high percentage of certainty, so that only a few of the matings 

 made were other than the intended combination. 



This is the typical reaction given by inbreeding F^ mid-types with equivalent 

 Ac values and standard conditions, and no exception or variation thereto has 

 thus far been observed in Fo, and it is everywhere consistent in ratios, products, 

 and the dominance in the larval characters of those from undecimlineata, 

 regardless of whether the undecimlineata parent was male or female. Unlike 



Table 14. 



Adult. 



11-lineata . . 

 11-lineata . . 

 11-lineata . . 

 11-lineata . . 



Mid 



Mid 



Mid 



Mid 



Signaticollis 

 Signaticollis 

 Signaticollis 

 Signaticollis 

 11-lineata . . 

 11-lineata . . 



Mid 



Mid 



Signaticollis 

 Signaticollis 

 11-lineata . . 

 11-lineata . . 



Mid 



Mid 



Signaticollis 

 Signaticollis 

 11 lineata . . 

 Mid 



Signaticollis 



Appearance. 



Larvae. 



Color. 



Wh. 



Wh. 



Wh. 



Wh. 



Wh. 



Wh. 



Wh. 



Wh. 



Wh. 



Wh. 



Wh. 



Wh. 



Wh. 



Wh. 



Wh. 



Wh. 



Wh. 



Wh. 



Yl. 



Yl. 



Yl. 



Yl. 



Yl. 



Yl. 



Yl. 



Yl. 



Yl. 



Pattern. 



In testing the composition 

 proved to be — 



ABC = ABC 



ABCc = ABCc 



ABbC = ABbC .... 

 ABbCc = ABbCc .. 

 AaBC = AaBC .... 

 AaBCc = AaBCc . . 

 AaBbC = AaBbC . 

 AaBbCc = AaBbCc 



aBC 1= aBC 



aBCc = aBCc 



aBbC = aBbC 



aBbCc = aBbCc . . . 



AbC = AbC 



AbCc = AbCc 



AabC = AabC 



AabCc = AabCc . . . 



abC = abC 



abCc = abCc 



ABc = ABc 



ABbc = ABbc 



AaBc = AaBc 



AaBbC =AaBbc . . . 



aBc = aBc 



aBbc = aBbc 



Abe = Abe 



AabC = AabC 



abc = abc 



No. of pairs 



tested of 



each. 



9 

 2 

 1 



14 

 2 

 3 

 2 

 7 

 5 

 2 

 1 

 2 

 3 

 1 

 5 

 2 

 4 

 1 

 2 

 4 

 2 

 1 



11 

 4 

 5 

 2 



Total tested between 1907 and 1910 (pairs) 105 



Note. — The number of pairs tested in the above table has no relation to the 

 frequency, owing to my being able to rather accurately determine by inspection the 

 composition and many matings made for purposes other than this test. 



the cross of diversax signaticollis, the array in Fg shows nine different kinds of 

 mid-types, only one class of which is comparable to the F^ condition and occurs 

 closely in tests and recognized counts on the average of eight times in the total 

 frequency of combinations. All other mid-types are different in their constitu- 

 tion and reaction from the F^ and the one class of Fj mid-types. I have no 

 'doubt that this represents a typical and perfect instance of the b-ehavior present 



