424 LUMINOUS INSECTS. 



We often see without being able to account for the fact, 

 except on Sir E. Home's idea, that the sex of the 

 ovum is undetermined 3 , traces of an organization in 

 one sex indisputably intended for the sole use of the 



other. 



I am, &c. 



a Phil. Trans. 1799. 157. 



