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offspring, and, in fact, produced a larger proportion of normal 
beetles in the fourth than in the third generation. This, how- 
ever, may have been at least partly due to the smaller number 
of offspring of the fourth generation reared to maturity. It 
is possible, but we will not say how probable, if the breeding 
of this phase in a direct line had been continued longer, that 
ultimately the production of a practically pure race would have 
been reached. 
HEREDITY OF THE NORMAL PHASE. 
No attempt was made to breed the normal phase in the 
direct line, as we already know that this phase was introduced 
into the Hawaiian Islands years ago, and that it has bred true | 
to itself here since that time. The heredity of beetles of the 
normal phase derived from the nine-spotted form, however, may 
be considered. 
Pair No. 8 of normal beetles were reared from the nine- 
spotted females No. 1 and 2, the character of whose offspring 
we have already seen. From this pair were reared eleven 
normal offspring. 
Both beetles of the normal pair No. 24 were reared from 
the nine-spotted pair No. 18, and hence the parentage had been 
nine-spotted for three preceding generations in the female line, 
and at least for two generations in the male line of descent. 
From this pair seven normal. beetles were reared. 
Although these experiments are not extensive enough to be 
conclusive they seem to indicate that the normal phase is more 
stable than the nine-spotted phase. Presumably, however, the 
production of the nine-spotted phase from such parentage is 
possible, and at least occasionally takes place, although more 
rarely than the production of the normal phase from nine- 
spotted parentage. 
HEREDITY OF THE NORMAL CROSSED WITH THE NINE-SPOTTED 
PHASE. 
One mating was made to determine whether either the nor- 
inal or nine-spotted phase were dominant over the other in 
heredity. Pair No. 31 consisted of a female of the nine-spotted 
phase reared from pair No. 12 and a normal male of Hawaiian 
stock. [from the account already given of the heredity of the 
