LETTERS ON ENTOMOLOGY. 
which envelops its eggs in a little silken bag 
which it always carries about, and when the 
young ones come out, they climb on their mother's 
back and cling fast, let her run ever so swiftly. 
The bees, and some kinds of wasps, feed their 
young many times a day like birds ; and others 
place their eggs in cells, which they make of 
earth, and shut them up with a sufficient quantity 
of food to last till they attain maturity. 
Some insects have a tender and delicate skin, 
which could not withstand the friction and 
chafing it would be exposed to, and therefore 
nature teaches them to make real garments, some 
of wool, some of silk, and others of leaves and 
different substances ; some make them longer and 
larger as they increase in size, and others make 
new ones. 
I remember seeing on a vine in the green- 
house, a singular whitish insect with six legs, 
bearing a roof of particles of mortar and earth 
seemingly combined with some glutinous sub- 
stance, and the little creature ran briskly along 
under its load, completely covered and defended. 
If you find the subject amusing, I will con- 
tinue my correspondence soon ; till then adieu. 
