Repokt ok the State Geologist. 



671 



means aud give the power of action. Further : It must also 

 protect this concerted action from the thriftless ignoramus 

 that don't care for himself or neighbors. The fact is, that 

 the ravages of hostile insects represent a condition of war, 

 and it is only by organization, and appropriate weapons, that 

 they can be conquered. The proper subjects for considera- 

 tion are the materials to be used, the best time to make the 

 attack in force, and the weapons to be employed. It is 

 entirely useless for as to fold our arms and exclaim : " It is 

 the will of God !" 



The Colorado Potato Beetle. 



Doryphora decemlineata, Say. 



a, a, eggs ; b, b, larva iu different stages of grovFth ; c, the pupa ; d, 

 beetles ; e, elytron magnified ; f, leg magnified. 



This pest is now really in our midst, and though not as 

 yet in sufficient numbers to do much harm, its previous his- 

 tory ought to give us warning. The great interest felt on 

 account ot this intruder has been manifest by the countless 

 bugs of all descriptions that I have received by mail this 



