NINETEENTH EEPOET OF STATE ENTOMOLOGIST 25 



Bee Fly Larvae {Bomhyliidae) . Bee fly larvae were found to be 

 fairly abundant in many districts in the egg-beds of grasshoppers, 

 especially those of the warrior grasshopper {Camnula pellucida 



Scudd.). 



A Sunflower Maggot (Straussia longipennis Wied.). This mag- 

 got was found infesting 80 per cent or more of the Giant Russian 

 sunflowers grown on the college farm at Bozeman and was present 

 also in other parts of the Gallatin Valley. Although the percentage 

 of plants infested was high, the actual decrease in tonnage was small. 

 The maggots bore through the pith for almost the entire length of the 

 stalk, then leave the plant by boring their way to the outside some few 

 inches below the head, fall to the ground and there pupate about the 

 roots, remaining in the pupa stage over the winter. 



Currant Fruit Fly (Epochra canadensis Loew.). This chief pest 

 of the currant in Montana continues to exact its annual toll of dam- 

 age to the currant crop. 



BEETLES (COLEOPTEEA) 



Fiery Ground Beetle (Calosoma calidum Fab.). This beetle with 

 its grub which has been called the "cutworm lion" has become more 

 abundant in northern Montana where it is one of the chief predators 

 of the pale western cutworm {Porosagrotis orikogonia Morr.). 



Granary "Weevils (Calendra granaria L.). Only two infestations 

 of the granary weevil have come to our attention and this insect is 

 not believed to be widespread or the cause of much serious damage in 

 the State. Laemophloeus pusillus Schon was found along with Cale7i- 

 dra granaria L. but in much smaller numbers. (See page 17.) 



Aphodian Dung Beetle (Aphodius inquinatus Hbst.). Many 

 specimens of this insect in the larval stage came to the laboratory for 

 determination as it was thought^ to be causing damage to crops. Adults 

 of this species were reported in May, 1920, to have fed on seeded wheat 

 in Chouteau County but there was no evidence whatever to show that 

 the larvae were the cause of any damage. 



Cottonwood Leaf -Miner {ZeugopJiora scutellaris Suff.). Cotton- 

 woods suffered severely from this insect during August and September. 



Wireworms (Elateridae). In one county in north central Mon 

 tana wireworms were reported to have caused a loss of $30,000, mostly 

 on winter wheat. It was also declared that summer fallowed fields 

 suffered the most. The finding of more adequate control measures for 

 this pest has become very important to the grain interests of the State. 



