ARTHROPODA. 



209 



their workers winged. Some are solitary, and some 

 social. The Wasps make their nests, not of wax, but 

 of gnawed wood, made into a material like very thin 

 paper. The Wasps provide their larvffl with honey 

 and with insects ; the Bees provide theirs with honey 

 and " beebreadj" a mixture made of the pollen of 

 flowers. 



The Humble Bee {Bombus terrestris) makes its nest 

 iu: the ground, and does not produce a "comb." 

 It piles up masses of pollen, which the enclosed grubs 

 mould into oval hollow cells. It has been stated that 

 the old bees liberate them, when they are mature, by 

 removing the top of each cell. The empty cells are 

 afterwards used to store honey in. 



Fig. 63.— Xeat anl ce Is of Humble Beo (Bombus terrestris) 



