136 MISS MAUDE L. CLEGHORK ON THE INHERITANCE OF 



Experiment B. — Cross between univoltine Ital.-Jap. Hybrid 

 $ and mnltivoltine Nistri J . 



This was carried out for four generations only and then 

 discontinued, as the cocoons were not as good as those of the 

 reciprocal cross, rarely averaging a weight of 3'5 grains. 



Residts of Experiment as regards the MtdtivoUine and Univoltine 

 character of the Silkivorm Moths. 



Experiment A. 



Table 2, illustrating the descent of the univoltine character in 



THE CROSS BETWEEN ItAL.- JaP. S AND ISTlSTRI $ . 

 Multivoltine Nisti-i ? X Univoltine Ital.-Jap. <J ... „ Pi 



Laj'ings all mnltivoltine F\ 



Many more ? s than $ s. 



22 layings univoltine. 30 layings almost univoltine. 6 half multivoltine ^2 



More (? s than ? s. 



6 layings univoltine. 16 about half univoltine. 2 multivoltine JFs 



More ? s than ^ s. 



A few layings univoltine. One 75% multivoltine. Many partly multivoltine ... Fa 

 More $s than $s. 



One 75 % multivoltine. 2 half multivoltine. 15 partly multivoltine F^ 



(?s and $ s about equal. 



All about half multivoltine : Jg 



Nearly all about half multivoltine. A few about 75% multivoltine F-; 



Nearly all completely multivoltine F^ 



All multivoltine Fg 



All multivoltine ...........'......;.;...... .Fin 



