236 MONTANA EXPERIMENT STATION. 



are bright blue ; the antennae of the male are long. It occurs prin- 

 cipally on the range, in Montana, having seldom been found in ir- 

 rigated valleys. 



Melanoplus atlanis Riley. THE LESSER MIGRATORY LOCUST 



This species is distributed throughout most of the United States 

 and Canada and often becomes so abundant as to be injurious. In 

 Montana we have found it in cultivated fields where it has occasion- 

 ed considerable loss, and on the range where in association with A. 

 elliotti it has been injurious. The tibae are usually red. The size and 

 general appearance. of the species are shown on the accompanying 

 plate (Plate IV, figures i and 2). 



Camnula pellucida Scud. THE YELLOW-WINGED LOCUST. 



It may be safely said that not a year passes in which this spe- 

 cies does not become injurious in either one part or another of the 

 United States, usually in the northwest. It feeds particularly ort 

 grasses and grain. In Montana it has been found to be local in its 

 distribution and has been destructive on the range in only a few re- 

 stricted areas. The under wings are yellow, the upper wings and 

 general surface of the body are variable in color, between yellow and 

 Thrown. 



Melanoplus bivittatus Say. THE TWO-STRIPED LOCUST. 



This is among the larger grasshoppers of Montana. It occurs 

 throughout the greater part of the United States. It is especially in- 

 jurious in cultivated fields and so far as our experience goes is 

 practically the only species- that has caused injury to alfalfa. The 

 femora have longitudinal stripes and there are two yellowish stripes 

 on the back. 



Hippiscus neglectus Thomas. 



We found this grasshopper to be fairly common over the larger 

 part of the affected territory. Its appearance is well shown in the 

 accompanying figure. (Plate VI, figure 2.) 



