vii.] DISCUSSION OF THE DATA OF STATURE. 137 



are of a convenient size for statistical purposes, say from 

 50 to 100, neither too few to make satisfactory Schemes, 

 nor unmanageably large. They can be mounted as 

 we all know, after their death, with great facility, and 

 be remeasured at leisure. An intelligent and expe- 

 rienced person can carry on a large breeding establish- 

 ment in a small room, supplemented by a small garden. 

 The methods used and the results up to last spring, 

 have been described by Mr. Merrifield in papers read 

 February and December 1887, and printed in the Tran- 

 sactions of the Entomological Society. I speak of this 

 now, in hopes of attracting the attention of some who 

 are competent and willing to carry on collateral experi- 

 ments with the same breed, or with altogether different 

 species of moths. 



