234 



INSECTS 



that there is no further danger from these species. 

 Of course the usual repellents, camphor, naphthaline 

 and the like are useful, and gasoline is an excellent 

 destructive agent; but after all, care and protection by 

 tight boxes or paper bags is best. When carpets on 

 the floor are attacked and it is not convenient to take 

 these up, a liberal use of gasoline is indicated, until no 

 further traces of the insect work are noted. 



Fig. 109. — d. the carpet beetle/ a, its larva, the "buffalo moth' 



Almost every museum and every collector of speci- 

 mens of organic natural history has to do with two or 

 three species that attack such dry products by prefer- 

 ence, and here again the ordinary repellents are brought 

 into use, supplemented by a free use of bisulphide of 

 carbon, ether or chloroform. None of these is advisable 

 in ordinary household use because of either expense or 

 danger, so there is no necessity for going into details. 

 The larger species such as the larder beetles are usually 

 controlled by screening or keeping the provisions prop- 

 erly covered. The leather beetles that occur more 

 commonly in manufacturing establishments must be 



