158 Inheritance (iiid Evolution in Ort/ioptini / 



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

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

 following progeny : 



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

 and they gave in i^j the three following types : 



Actual Numbers ... 9 30 13 t\ 



Expectation 



{h) A male leuconotus {B), from the F„ generatinn 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 Fo the following progeny (Table IV (6), F.,): 



Leuconotus- 

 Leuconotus luteonotatus Luteonotatus 

 (if) (BH) (H) 



Actual Numbers ... 4 8 5 



Expectation ... 425 S-.'j 4-2.^ F.. 



The.se results, as in the other cases (E.\p. II (a), (b), (c)), give the 

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

 proving them to have been homozygous nigronotatus (7) and luteo- 

 notatus (H), respectively. 



