656 INSECT PESTS OF FARM, GARDEN AND ORCHARD 



They live, like true ants, in colonies and have different kinds 

 of individuals or castes. 



Except for the black, winged males and females which may be 

 seen emerging and flying from the. nests for a few days in the 



FIG. 576. The house centi- 

 pede (Scutigera forceps): 

 Adult. Natural size. (Alter 

 Marlatt,U.S.Dept.ofAgr.) 



FIG. 577. Adult book-louse, about 

 fifty times natural size (After 

 Back, U. S. Dept. of Agr.) 



spring, they are soft-bodied, yellowish-white, wingless insects 

 about one-fourth inch long. They normally live in decaying 

 wood out of doors. 



Control consists largely of prevention. Where they are 

 prevalent it is well to use concrete for foundations or to treat 

 timber to be used with creosote preparations of some kind. 



The insects injurious to stored grains infest also many stored 

 food products. For a complete discussion of these the reader is 

 referred to Chapter X. 



