THE HUMBLE BEE. 



83 



think that they are being watched, will take instant offence and 

 fly off with a quick, eager sound, very different from the steady, 

 monotonous hum with which they accompany their researches. 

 To watch one of these insects in hopes of seeing her begin her 



BOMBUS TERRESTRIS. 



BOMEUS LAPIDARIUS. 



labours, is an endless task, for she will never dig an inch of soil 

 as long as she sees any suspicious object, and will often make 



