Montana Experiment Station. 



BULLETIN 31. DECEMBER, 1903. 



INTRODUCTION. 



This first Report of the State Entomologist of Montana contains 

 an account of a few of the most important insect pests of Afontana 

 and in addition, a fairly complete, though condensed, manual of 

 insect pests. This manual is intended to put in easily accessible 

 form the most important information regarding a large number of 

 insects now in the state or liable to be introduced. 



Considering the great importance of the codling moth, the 

 reader will perhaps expect to find an account of it in this report. 

 However, such an account is omitted for two reasons, first, a report 

 on this pest was issued from the Experiment Station a few months 

 ago, copies of which are still available for distribution, and, second, 

 it is intended to conduct further investigations on this pest during 

 the coming summer (1904) and we shall desire to publish those 

 results one year from now. In view of the fact that the codling 

 moth will for years to come be the most important insect pest with 

 which Montana apple growers will have to contend, it is our inten- 

 tion to make the next report upon the subject the most complete 

 and practical that has yet been issued from this Station. 



In view of the great economic importance of grasshoppers 

 and because of the unusual demand for information concerning them, 

 we have given them prominence in this report. 



W^e renew our statement of willingness to answer inquiry re- 

 garding insect pests. Such recjuests for information should always 

 be accompanied by specimens of the insects that are doing the 

 damage and a statement of the facts necessary for our information 

 in making recommendations. 



Every vegetable product of the soil is subject to the attack in 

 insect life and every crop that is grown by men is more or less in- 



