58 inheritance and Evoliitio7i in Ortlioptera IV 



Experiments. 



Analysis of the original material. One male of the appearance of 

 BF (see plate), one male of the appearance of GF, three females of the 

 appearance of MM, and one female of the appearance of EEH, con- 

 stituted the original material. They were mated as follows : 



(3) GF X MM, 



(5) DF' X MM, 



(13) DF^ X MM, 



(9) DF xEEH. 



These and the subsequent matings are shown in the table of matings 

 which shows how all of the analyses were carried out. 



It may be said that many of the matings were made, not so much 

 in accordance with a previously arranged schedule, but because they 

 represented the only available material. No doubt many of the analyses 

 could have been carried out to better advantage, especially if one could 

 have counted on having the right male and female adult at the same 

 time, and if the contingency of the death of a valuable specimen did not 

 tiave to be reckoned with. 



Explanation of Table I. This table gives the entire pedigree. The 

 matings are arranged in serial order reading in columns down the page 

 and from left to right. The number in parentheses immediately above 

 the horizontal line is the mating number ; the number in parentheses 

 above the mating is the mating from which the parents came. Take 

 for example : 



(9.3) 



EF X EF 



(9.16) 



~1 

 EE EF FF 



7 21 8 



Expectation 9 18 9 



This is mating number (9.16), the parents coming from (9.3). The 

 actual numbers are 7 : 21 : 8 and the expectations 9:18:9 respectively. 



The original male DF was used in (5), (9), (9.1), and (13) and is 

 indicated thus : *DF. 



^ Same male. 



4 



