8S THORAX. 
Lucy, I understand the marks of 
the order; now, how are the genera 
known ? 
Mother, The division of the genera, 
in this order, is not so simple as it is in 
lepidoptera. The distinguishing marks 
for each genus are more numerous, and 
are taken, not only from the antennae, 
but from the form of the elytra — the 
number of joints in each foot —the shape 
of the thorax — and the number o^ palpi, 
Lucy, This order must be much more 
difficult than that of the lepidoptera: 
but what is the thorax ? 
Mother. The thorax^ is the part 
next to the head, and may be called the 
back of .the breast ; it is very variously 
marked, and is therefore a good guide 
in the division of the genera. 
Lucy, I wish I could find one of 
these creatures, that I might see the 
shape of the thorax, and that I might 
look at the foot, for I cannot imagine 
* A breastplate^ 
