58 



Journal New York Entomological Society. [Voi. xv. 



2. Proportion of the Sexes. — In an examination of 763 specimens 

 of this insect reared during the entire season from the usual host eggs, 

 the sexes were found to exist in about equal proportions, with a 

 slight preponderance of the females, as shown in the attached table. 



Table I. Proportion of Sexes. 



The proportion of the sexes in the variety nigra Girault is as 24 

 males to 27 females. The proportion of the sexes in specimens 

 reared from single hosts may be seen by consulting the table just pre- 



