THE GOLDFISH AND 1TS CULTURE, 121 
fly makes its appearance through the back of the grub, rising upon 
its wings into the air as soon as they are unfolded and dry. 
The eggs are also produced twice in a season, the grubs from the 
last deposit, living in the mud during the winter, and produce in the 
zarly spring the first dragon flies of the season. 
Their natural enemies are the frog and the water-spider. The 
latter, small as it is, compared with their own size, is, nevertheless a 
powerful antagonist, attacking them when in the act of depositing 
their eggs. The attack is made upon the eye, the largest dragon-fly 
thus being easily overpowered by its small but intelligent enemy. 
How strange it is that just those animals with which man has the 
least sympathy are among his best friends! Such are the toad and 
the spider! 
