276 



ERNEST WARREN, 



The four embi-yos in Stage 3 possessed a few unmistakable 

 hairs. 



Thus in 193 eggs laid by six unpaired females 4*1 per cent. 

 exhibited some sign of development, and 2'1 per cent, reached 

 a further stage in the formation of an embryo. 



There is, therefore, a slight, but quite definite, partheno- 

 geuetic tendency in menippe. 



We have seen above in the case of maia that the unpaired 

 moths laid eggs freely, and an average number of about 150 

 was produced. After the eggs had been laid some four weeks 

 about 150 eg-gs from a number of different moths were 

 opened in addition to those examined daily, but no trace of 

 development could be detected. Thus no parthenogenetic 

 tendency was demonstrated in this species. 



Menippe ? x Maia S. — We now return to the paired 

 moths (see list, p. 273, a), and the accompanying table gives 

 the necessar}^ details. 



On compnring the above two tables it will be seen at once 

 that with the exception of the pair No. 6 there is very great 

 increase in the degree with Avhich development occurred, and 

 also in the number of eggs in which such development was 

 present. This is shown in the accompanying comparative table. 



