sport m Melasotfia and its Behavior in Heredity 237 



Extracted AB from hybrid S (Table VI, e) breeds true appar- 

 ently in the first generation. 



Unfortunately no matings were made with extracted AB from 

 hybrid B. 



SUMMARY OF RESULTS 



1 That a number of totally black (AB) individuals were col- 

 lected out-of-doors shows that the type is a natural type. 



2 AB, as a sport, mated with its own type, produced, in the 

 first generation, broods in which the sport type predominated; 

 in later generations the alternative character was gradually elim- 

 inated. 



3 AB as a sport transmits the character B, but fails completely 

 to transmit the character S. 



4 S and B completely dominate the type AB. 



5 Extracted AB (AB that has become recessive through a 

 cross with S and has later been recovered) produces AB only. 



6 Hybrid S (S from S andAB) transmits AB, it may produce 

 broods that are wholly S or mixed broods of S and AB, in which 

 individuals of the S character predominate. 



7 Hybrid B (B from B and AB) transmits AB; it produces 

 mixed broods with individuals of the character B predominat- 

 ing- 



8 AB is eliminated from the S or B line in the second genera- 

 tion from a cross between S and AB, or B and AB, hence the sport 

 type, although inherently stable, is swamped in back-crossing. 



9 Extracted B from hybrid S (S xAB) breeds true. 



10 Extracted B from the sport AB (AB xAB) transmits AB, 

 but predominates in the broods. 



11 The character I, a mosaic of B and AB, occurs. It has 

 no apparent stability, but may appear in any cross into the lineage 

 of which AB has been introduced. 



There is no general adherence to Mendelian proportions in the 

 behavior in inheritance of the sport AB in Melasoma scripta but 

 it behaves as a Mendelian recessive in first crosses with both S and 

 B, breeding true from hybrid S. 



