EXPERIMENTS UPON ACRiEA ENCEDON. 



401 



Seven out of the 10 mixed groups are exactly or approximfttely half 

 infuscata and half lycid. The remaining three are Company 5 with 6 iirfiiscata 

 to 16 lyciaj Family 7 with 3 to 9, Family 8 with 7 to 21. It is rather curious 

 that the proportions are here — exactly in the 2 families and approximately in 

 Company 5 — the Mendelian expectation if lycia were dominant and 2 hetero- 

 zygotes had paired : an interpretation untenable for Family 1, of which the 

 $ parent was not lycia. The probable explanation of these irregularities and 

 that exhibited by Company 7 has been suggested on p. 396. 



Among the 9 groups with mixed sexes, out of . the 28 companies and 

 families, 1 is all infuscata (parents unknown), 5 are all lycia (known parents 

 6 $ lycia three times), and 3 are mixed infuscata and lycia (known parent 

 2 infuscata once). Of thes(^ 3, Company 7 with 3 infuscata to 13 lycia is 

 considered above, while the other two give approximate equality (Family 3) 

 and probably rough equality (Company -1). , 



Probable existence of tivo strains of females, one producing all-female, 

 and the other male and female families. 



It will be observed in the Table on pp. 397-8 that Family 2 with mixed 

 sexes was produced by a male and female Z?/cza from Company 4 also made up 

 of males and females. These facts favour the conclusion that the pow er of 

 producing mixed sexes is hereditary. Confirmation is also provided by the 

 offspring of Family 16, with mixed sexes, bred from a pair of lycia captured 

 in the wild state. From two of these offspring sprang Family 19, also of 

 mixed sexes. The relationship between Families 16 & 19 is shown in tlie 

 following Table. 



iV/iD S Lyc//i P 



% L Yc/A Q ^ ty/Loit YC/A R ? /. re //I S A mzo $ iyc/a ff 



/^/IM /S /9%LyClA 



f/ini. IS. Z9- StrciAiie ^trcM.. 



F/!M./7. 5'^ ^/.rcit 



fAM.ia. II $ LYCIA. 



The existence of a strain producing nothing but females is supported by 

 stronger evidence ; for the breeding experiments extended over 3 generations, 

 also set forth in the accompanying Table. In this we see that two males from 

 the mixed Family 16, paired with females from the all-female Family 14, 

 produced nothing but females in the resulting Families 17 and 18. 

 Another male from Family 16, paired with a female from the same family, 

 produced, as stated above, the mixed Family 19. 



