v1 A HUMBLE-BEE HOUSE IOI 
lapidarius nest and inject honey into the cells, or 
withdraw honey from them, by means of a bulb- 
syringe, without fear of the workers becoming 
alarmed and flying out. I could also do this with 
weak colonies of ¢tevvestris, but populous colonies of 
terrestvis threw themselves into a state of angry 
tumult as soon as I attempted to lift the glass. 

Fic, 21.—Comb of B. zerrestrvis from Sladen’s Humble-bee House. 
In populous nests, the bees fastened the sides of 
the glass to the top of the section with wax. If there 
was sufficient space they would also cover their comb 
with a dome of wax which, of course, hid the comb 
from view for the time being, but in Zapzdarzus nests 
this wax was easily removed with a pair of forceps. 
The bees generally built their honey-pots in 
the projecting wings of the sections. This is 
well shown in the accompanying photograph of a 
4 in. xX 5 in. section from a ¢errestrts nest (Fig. 21). 
