158 Inheritance and Evolution in Orthoptera 1 



These were bred further as follows : a male leuconotus was mated to 

 a sister leuconotus-nigronotatus {Bl) female, and they gave in F^ the 

 following progeny: 



These F^ leuconotus-nigronotatus {Bl) were inbred, 1 male x 2 females, 

 and they gave in F^ the three following types : 



Leuconotus- 

 nigronotatus 

 {Bl) 



30 



26 



Nigronotatus 

 (I) 

 13 

 13 



J^4 



(6) A male leuconotus (J5), from the i^o generation of a pure 

 leuconotus culture, and a female luteonotatus {H), whose parents had 

 been taken from nature, were mated, and their F^ progeny were all 

 distinctly marked leuconotus-luteonotatus heterozygotes (Table IV (6), 

 F^. Two males and two females of these were inbred and, after great 

 mortality, they gave in F^ the following progeny (Table IV (6), -^2) : 



Actual Numbers 

 Expectation 



Leuconotus 

 (^) 

 4 

 4:25 



Leuconotus- 

 luteonotatus 

 {BH) 



8-5 



Luteonotatus 



5 



4-25 Fa 



These results, as in the other cases (Exp. II (a), (6), (c)), give the 

 clue to the composition of the unknown first parent in each case, 

 proving them to have been homozygous nigronotatus (/) and luteo- 

 notatus {H), respectively. 



