28 HOW TO TEACH BEETLES, BUGS, AND LOCUSTS. 
and nearly a foot across, from tip to tip, when the 
wing-covers are spread. The thorax is armed with 
a huge horn, as is also the head. This gives him 
a very formidable appearance. Many beetles of 
this family have horns, some of which are branch¬ 
ing; hence, one species is. called the stag-horn 
beetle. 
3. Blister-beetles are remarkable in many ways 
chiefly on account of their many changes during 
development (hypermetamorphosis). These changes 
are too complicated to describe here. What is of 
especial interest to us is the use of these insects in 
medicine for producing blisters. 
4. The Buffalo-beetle or “ carpet-beetle ” derives 
its names from having been first described in Buf¬ 
falo, N. Y., where it was found injuring carpets. 
It may be got rid of by using benzine, gasoline, 
kerosene, hot water, corrosive sublimate (poison), or 
naphthaline. 
