iM MONTANA BULLETIN L70 



eastern Montana in surprising numbers so that several quarts of them 

 were collected and preserved in alcohol. While not an economic species, 

 it occasions interest whenever seen by the farmer. 



The Mormon Cricket {Anabrus simpler Hald.). These large 

 crickets which sometimes appear in great numbers, eating y everything 

 in their path, were again present in both years in certain parts of 

 the State, where some damage was done. A recent publication of 

 the Colorado Experiment Station explains a method of destroying 

 these insects. 



The Jerusalem Cricket (Stenopalmatus sp.). This large, clumsy 

 cricket is sent in nearly every year from the eastern portion of the 

 State. It lives under stones and in loose soil. Because of their large 

 heads and baby-like faces they are always objects of interest when 

 found. 



The True Bugs, Plant Lice, etc., (Hemiptera) 



The Vagabond Poplar Gall {Pemphigus vagabundus). The gro- 

 tesque galls produced by this interesting species were sent in again 

 and again during the year by persons whose curiosity had been aroused. 

 While not doing serious harm to the cottonwood trees on which they 

 feed, the growths they produce disfigure the trees and are objectionable. 



The Elm Gall Louse (Schizoneura americana Riley). This is per- 

 haps the most serious enemy of the elm in Montana. A number of 

 cities are becoming interested in spraying their trees to destroy the 

 insects. It has now spread until nearly every elm tree in the State is 

 affected. It persists year after year. 



The Woolly Aphis (Schizoneura lanigera Hausm.). The woolly 

 aphis, after a few years of less importance, appeared again in notice- 

 able numbers in the western part of Montana during 1923 and 1924. 

 The white masses of these insects can be seen for some distance. The 

 insect is objectionable because of the fact that in picking the fruit in 

 the fall the insects get crushed and stain fruit that otherwise would 

 he marketable. 



The Currant Leaf Aphis (31ysus ribis Linn.). The pale, yellow- 

 ish-green plant lice of this species cause a distorting or a reddening 

 of the foliage. Affected leaves were sent in repeatedly this season and 

 the species was prevalenl throughout the State. 



The Cabbage Aphis (Brevicorym brassicm I, inn.). This very 



