176 TRANSFORMATIONS OF INSECTS. 
black; the female is almost entirely yellow, and is spotted with 
black. The adult insect flies during the summer months, and the 
THE METAMORPHOSES OF Lophyrus pint. 
females saw the tissues of the twigs and fine stems of fir-trees, 
and insert their eggs. The females are so industrious, and are 
so prolific, that vast numbers of eggs are laid upon a tree, and 
the parent seems to know that there will be enough and _ to 
