EL HiNDLK 271 



Secofui SerUs — (continnni). 



' The male ex N2 of 02 was also crossed with female ex N 13 of 06 (Family () IH). 

 * The male ex A' 2 of O 7 was also crossed with female ex N 7 of O 14 (Family O 19). 

 ^ This ? may have strayed from O 16, as a larva from O 16 was accidentally included 

 with O 14. 



A glance at the above records will show that there are at least three 

 distinct types of families, male, female, or mixed. Therefore, four kinds 

 of crosses are }X)ssible, namely, 



A. ? ex female family x d ex male family. 



B. ? ,, ,, X (? ex mixed family. 



C. ? ex mixed family x ,j ex male family. 



D. ? ,, ,, X (^ ex mixed family. 



These four types of crosses willbeconsidered .separat<^lv(see Tables I — IV"). 



