EXTERNAL SKELETON, 
17 
radii, which get rubbed off, and old bees are fre- 
quently found with radii only on one side (Fig. 5,/), 
or like h (Fig, 5). If we examine a bee we will find 
that its body is separated into three distinct regions, 
known as the head, thorax, and abdomen. Of these 
we shall treat in the following chapters. 
c 
