NINTH ANNUAL REPORT STATE ENTOMOLOGIST 8» 



nneasy with excellent reason. This insect is not in our State yet 

 so far as we know. During the coming summer we plan to make 

 examination of the alfalfa fields along the railway of the Oregon 

 Short Line, from Butte south. During the present year we have 

 been making inquiry and putting people on their guard against 

 it. Purchasers of alfalfa seed have corresponded with us regarding 

 the advisability of buying seed out of Utah. 



New Aphis of Wheat {Brochycolus sp.). This louse was re- 

 ported three times from the Judith Basin and vicinity during the 

 season. It was doing some damage and causing much alarm among 

 grain growers. We have not as yet been able to determine the 

 species. It may turn out to be entirely new. Attention will be 

 given to this next season. 



New Aphis of Cottonwoods (ArctapJiis sp.). We have receive" 

 two appeals for assistance in controlling an aphis new to science 

 which we have had under observation in Bozeman for a number 

 of years and which appeared in Deer Lodge this season in such 

 abundance as to seriously blemish the shade trees of that city. This 

 town is planning to provide suitable apparatus for spraying for this 

 insect. In doing this they will take the lead in such action in Moo- 

 tana and will deserve commendation. 



The Elm Gall Louse (ScJiizoneura americana Riley). The 

 elm is becoming increasingly popular as a shade tree but, so far 

 as our observations go, wherever the elm is present this insect is 

 abundant, seriously deforming the foliage. It is a species which 

 may be easily controlled but as yet very little has been done in 

 that direction in Montana. This gall louse and various other in- 

 sects demand attention. 



The Green Aphis {Aphis pomi De G.). All things considered 

 this is probably the most troublesome insect pest of the apple ia 

 Montana at the present time, although when the codling moth be- 

 comes more abundant, it will undoubtedly be more serious. As 

 common and as well-ksown as this insect is, we have received many 

 inquiries about it during the past year. The difficulty in controlling 

 ii lies in the fact that it is ordinarily overlooked until it has caused 

 the foliage to curl, thereby making it almost impossible to destroy 

 it. There is scarcely an apple orcliard in Moatana ira which it does 

 not occur. 



