TWENTIETH REPORT OF THE STATE ENTOMOLOGIST 25 



common pest of cabbage was again injurious in 1923 on cabbages and 

 cauliflowers. 



The Apple Aphis (Aphis pomi DeGeer). These plant lice were 

 in evidence in many orchards in the western part of the State in 1924. 



The Spruce Gall Aphis (Gill ei tea cooleyii Gill.). The galls of 

 this species are becoming rather common in parks and cemeteries 

 in Montana. It is prevalent in the mountains in some parts of the 

 State. It is not generally recognized that this growth is caused by 

 an insect. 



The Bedbug (Cimex lectularius Linn.). This insect continues 

 to be abundant throughout the State, especially in old buildings. There 

 is an increased interest in ridding bunk houses and other buildings 

 of the pest, since adequate methods have been worked out. During 

 1924 the Experiment Station published a circular dealing with the 

 control of this insect. 



The False Chinch Bug (Nysius ericae Schill.). These insects, 

 which in size resemble the chinch bug and at times become very 

 abundant, were troublesome again during the season of 1924. They 

 frequently swarm on garden vegetation. Generally they are more abun- 

 dant on weeds and sometimes attack plants of value. In 1923 this 

 species was outstanding in abundance. 



The Chinch Bug (Blissus leucopterus Say). The true chinch 

 bug does not occur in Montana. "We have previously reported it as 

 occurring here, due to an error in identification of the species, which 

 we are glad to correct at this time. The species which does occur here 

 is Blissus occiduus Barber. 



The Flies (Diptera). 



The Hessian Fly (Mayetiola destructor Say). This major pest of 

 wheat was found in the state of Montana for the first time in 1924, it 

 having spread across the eastern boundary. A considerable amount of 

 damage was done and the scouting that has been conducted has shown 

 that this pest is rather widely disseminated in that locality. 



Crane Flies (Tipulidae). The larva of an undetermined species 

 of crane fly was reported as exceedingly abundant in spring-plowed 

 land near Moccasin in 1924. 



The Currant Fruit Fly (Epoclira canadensis Loew.). The currant 

 fruit fly continues year after year a serious pest of currant and goose- 

 berrv fruits. It was more injurious in western Montana than else- 



