132 THE AMERICAN NATURALIST [Vol. LIII 



there have been discovered in nature eleven factors for 

 color patterns, all in the same series, but evidently only 

 a few, if any, are allelomorphs. Pending further con- 

 sideration, the patterns are designated as A A, GGr, KK, 

 MM, 00, EE, TT, WW, XX, YY and ZZ, respectively 

 (all conspicuous, except A A which is of a mottled gray 

 ground color and well protected). These patterns are as 

 sharply defined and distinct, each from any other, as are 

 those of Paratettix. Any two make a readily recog- 

 nizable hybrid pattern, with the elements of each parent 

 pattern seemingly equally represented, except that the 

 part of a hybrid pattern produced by the factor A, when 

 it is a member, is less clearly perceived, and such hybrids 

 can not be, in every case, superficially distinguished from 

 the pure, or homozygous, pattern of the more apparent 

 member. For instance, it requires trained and careful 

 scrutiny to distinguish between AK and KK, AW and 

 WW, AY and YY, etc. It appears that the pattern AA, 

 if it be the result of only the one factor, is quite different 

 from the others, not only in its manifestation in the 

 hybrid of which it may bo a member, but also, as will be 

 shown later, in tiiat it apjiears to result from crossing- 

 over niii.ui- tlie others. On the other hand, KW, KY, 

 WV, and most othei- hyhi-id patterns not containing A as 

 a rnemher ni'e slinr])l>- di-tinct, each making a composite 

 picture of botli coiiiijonents. ICven in case of linkage, 

 whei-e three, four or moi-e factors are combined, the in- 

 dividual ])resents tlie composite appearance of all the 

 patterns involved. For example, in KME, KME or 

 KKM. KVZ and !\KVZ individuals all the patterns con- 

 cerned are clearly \-isil)Ie and apparently equally repre- 

 sented. In rosix^ct to representation of patterns in the 

 hybrids, as well as in the actual resemblance of a few 

 of the patterns, tliere is striking parallelism between 

 some of the nuMul)ors of this genus and some of those of 

 Paratetfir. 



However, as alread\ suggested, in contrast with the 

 inheritance behavior in Paratettix, most of the factors 



