270 journal of Comparative Neurology and Psychology. 



mated insect, in which the necessity for it is also removed. The 

 question arises, Does the excitement or activity of the mating 

 instinct have an inhibitory effect upon the egg-laying apparatus, 

 or does the presence of the sperm in the receptive organs of the 

 mated insect incite the reproductive mechanism to the greater 



Series 2. l^ormal mated moths. 

 TABLE II. 



No. I. 

 Issued Sep. 3. 

 Mated Sep. 3 p.m. 



No. 2. 

 Issued Sep. 5. 

 Mated Sep. 3. 



No. 3. 



Issued Sep. 3. 



Mated Sep. 3. 



No. 4. 



Issued Sep. 3 



Mated Sep 3. 



TABLE II— Continued. 



No. 5. 

 Issued Sep. 4. 

 Mated Sep. 4. 

 Died Sep. 10. 



No. 6. 



Issued Sep. 2. 

 Mated Sep. 3. 

 Died Sep. 15. 



No. 7. 

 Issued Sep. 3. 

 Mated Sep. 3. 

 Died Sep. 12. 



Oviposited. Eggs. ' Oviposited. 



Sep. 5 p.m. 100 



6 140 



7 160 



Sep. 4 p.m. 



5 a.m. 



6 p.m. 



Eggs 



Oviposited . | Eggs. 



180 

 200 

 160 



Sep. 9 a.m. 



10 p.m. 



11 p.m. 



no 



3^ 

 300 



Total 



400 



Total 440 



Total I 442 



functional activity t This ability to prolong the egg-laying period 

 through several days is an apparent adaptation to a condition that 

 might exist amongst wild forms, but for which there appears to 

 be no necessity in this domesticated species under its normal con- 

 ditions of commercial breeding; that is, an adaptation either to a 

 scarcity of males or a late issuance of males in a particular area. 



