LUMINOUS INSECTS. 515 
and pupa states, there seems nothing inconsistent in the fact of some light 
being then emitted, with the supposition of its being destined solely for use 
in the perfect state: and the circumstance of the male having the same 
luminous property, no more proves that the superior brilliancy of the 
female is not intended for conducting him to her, than the existence of 
nipples and sometimes of milk in man proves that the breast of woman is 
not meant for the support of her offspring. We often see without being 
able to account for the fact, except on Sir KE. Wome’s idea, that the sex of 
the ovum is undetermined?, traces of an organisation in one sex indisputably 
intended for the sole use of the other. 
Tam, &c. 
1 Phil. Trans, 1799, 157. 
