SOMATIC MUTATIONS OF BRUCHUS. 



II 



of the white mutant cultures have white elytra and bodies and the 

 males have tan elytra but gray bodies. The black mutant stock 

 shows a more pronounced dimorphism, since its females had black 

 elytra and bodies, and its males tan elytra but grayish-black bodies. 

 A lesser difference is seen in the red mutation, for its females had 

 red elytra and bodies, while its males had tan elytra and reddish- 

 gray bodies. It is evident from this description that every male 

 had tan elytra. In conformity with an allelomorph series, the fol- 

 lowing formulae were designated by the author: red (R R), black 

 (R b R b ), white (R W R W ), and tan or wild (r r). These formula 

 also indicate the order of dominance. 



TABLE I. 



THE DATA ON THE ORIGIN, APPEARANCE, AND OFFSPRING OF ELYTRAL MOSAICS 



IN BRUCHUS. 



