22 HOW TO TEACH BEETLES, BUGS, AND LOCUSTS. 
color and in the yellow V-shaped markings on their 
wing-covers. The borers, as their name implies, 
bore into trunks of trees. Thus there is the apple- 
tree borer, the hickory-tree borer, the locust-tree 
borer, etc. The larvae have no feet. Their 
mouth-parts are very highly developed, their teeth 
being very sharp and hard. Thus they can easily 
bore into the hardest kinds of wood. 
The soldier-beetles are bright, handsome fellows 
in uniforms of black and yellow. They are always 
more or less numerous on the blossoms of the 
goldenrod. These beetles are always in motion 
and they fly well. 
WATER-BEETLES. 
Nowhere among insects is the adaptation of 
parts to environment better shown than in the 
water-beetle, or water-scavenger, as this curious 
beetle is called. 
The body is almost a perfect oval, being slightly 
pointed at the posterior end. The head is large 
and the eyes are rather prominent. The antennae 
are very curiously built, being club-shaped and 
small and almost hidden under the eyes. The 
maxillary palpi are long and look somewhat like 
antennae at first sight. 
The shell and wing-covers are bright, shining 
black or dull brown. The legs are flat and paddle¬ 
like. They are armed with long hairs or bristles. 
