60 MONTANA EXPERIMENT STATION Bui. 112 



horse beans on the forage crop plots. It is a common native species 

 which feeds on a great variety of plants. 



The Bumble Flower Beetle (Euphoria inda Linn.). The bumble 

 flower beetle was reported again this year, eating the kernels from 

 the almost ripened ears of corn. It does not seem to be abundant 

 enough to cause any great amount of damage. 



The Colorado Potato Beetle (Leplinotarsa decimlineata Say). 

 The Colorado potato beetle was abundant, and at the Huntley 

 Experimental Farm it completely cleared off the dry-land potato 

 plots in spite of three applications of arsenicals. In this instance the 

 insects were present in very unusual numbers. 



A Cottonwood Beetle (Monoxia debilis Lee). For the first 

 time, this beetle has been reported as doing considerable injury to 

 cottonwoods. Specimens were sent in from several localities and 

 were determined as this species. 



The Cottonwood Leaf Beetle (Lina scripta Fab.). Many reports 

 were received regarding the cottonwood leaf beetle, which seemed 

 to be unusually common this year. It was especially harmful to 

 nursery stock. In one instance it was so plentiful that arsenicals 

 did not prevent damage to the trees. 



Cottonwood Mining Beetle (Odontota sp.). This cottonwood 

 miner was not as plentiful as usual, though reports of it were received 

 from widely separated localities. Some years it almost completely 

 blackens the foliage of the cottonwood tree. 



The Larder Beetle (Dermestes I ar darius 'Linn.). This common 

 American and European household pest was sent in a number of 

 times as in previous years and was especially harmful to stored food 

 products in private houses. 



The Rosebud Curculio (Rliynchites bicolor Fab.). The rose 

 curculio did some damage to cultivated roses but was not as abundant 

 as previously. 



The Spinach Carrion Beetle (Silpha bituberosa Lee). There 

 was considerable damage to sugar beets in some localities due to 

 this insect. This damage was not as extensive as in some previous 

 years. 



The Ten-lined Leaf Chafer (Polyphylla decimlineata Say). 

 There was one request for information about this large and showy 

 beetle. It was doing no damage but merely had aroused the curiosity 

 of the finder. 



