‘270 NATURAL HISTORY OF WASPS. 
principle of the exhaustion, not the voluntary action, 
of the queen determining the sex of the brood founded 
in fact? 
Such questions might easily be multiplied, not only 
as relates to the subject immediately under considera- 
tion, but on many other points of the Natural History 
of Wasps. And if I leave off now, it is not because 
I have told all their story, even what my own note- 
books tell, much less what other books and further 
observation could, and I trust will, show. It is 
because the wise man says,* “ Withdraw thy foot from 
thy neighbour’s house, lest he be weary of thee, and 
so hate thee.” 
* Proverbs XXV, 17. 
