52 



Inheritance and Evolution in Orthoptera III 



TABLES (continited). 



The / part of the pattern in this new combination is considerably 

 modified. In the IS, BIS or CIS individuals the normal pigment of 

 the dark mahogany spot which is most characteristic of //, and stands 

 out sharply in the hybrids BI, IS and others, seems to be diffused or 

 scattered over the area of the pronotum normally occupied by the spot, 

 and in addition extends over all the posterior part of the pronotum. 

 This scattering of the pigment, normally concentrated in the spot, gives 

 the whole an appearance of being diluted, or diffused. The SS part of 

 the pattern appears to be normal. The arrangement is indicated on 

 Plate II. 



The significant feature is the complete combination, or linkage, 

 apparently permanent, of the factor for S and the factor for the modified 

 / which is sufficiently demonstrated in the accompanying breeding 

 tables. This combination, IS, becomes a new form, a new multiple 

 allelomorph, pairing with, and allelomorphic to, any other multiple 

 allelomorph with which it has been tried, including the forms (multiple 



