133 
difficult of Mendelian interpretation, although they are per- 
fectly segregative in inheritance. On the whole the evidence 
in this species and in other species of Coccinellidae with cor- 
responding forms, would indicate that the inheritance of these 
forms is not Mendelian and that the laws governing its mani- 
festations are not yet discovered or understood. Taken to- 
gether, however, the normal and nine-spotted phases form one 
unit of the allelomorphic pair of which the black phase is the 
other unit. 
