l.')() Inheritance and Evolution In Orthoptera I 



{b) A leucothorax-rufrolineatus {GF) male from Exp. II (c), F^ 

 (Table II (c), F^ was mated to a leuconotus-luteolineatus {BE) femak- 

 from Exp. II {b), F, (Table II (6), F,) and the re.sulting F^ progeny 

 were as follows {F„ Table III (b)) : 



(c) A leucothorax-luteolineatus (GE) male from Exp. II (c), F^ 

 (Table II (c), F^) was crossed with a leuconotus-luteolineatus {BE) 

 female fn)m Exp. II {b), F, (Table II (b), F,) and they gave in the 

 Fi generation (Table III (c), F,): 



Actual Numbers 

 Expectation 



{d) A leuconotus-luteolineatus {BE) male from Exp. II (b), F-. and 

 a female leuconotus-leucothorax (56*) from Exp. Ill (e), F^ were mated 

 ;\\n] the}' gave in the F^ generation the following progeny : 



This experiment, (rf), was carried on subsei|ueutly to (c) which is the next experiment 

 in this series to be described.) 



The results from these crosses gave nothing new. They can be 

 accounted for clearly by assuming that the parent heterozygotes gave 

 gametes alternatively for each parent type of which they were composed 

 and that in fertilization these gametes met by chance. Considering 

 the small numbers, it seems that the approximations to the expectations 

 of alternative inheritance are fairly close. However, the next cross (e) 

 in this series is not so regular. 



(e) A leucothorax-luteolineatus {GE) male from Exp. II (c), F^ 

 (Table II (c), F^) was mated to a leuconotus-nigronotatus {BI) female 

 from a cross between an e.xtracted leuconotus {B) male and a nigi'o- 

 notatus (Plate VI, Fig. 9) female from nature. This leuconotus-nigro- 

 notatus female had the exact appearance of many other heterozygous 



