FIFTEENTH ANNUAL REPORT OF STATE ENTO.\[UL(JGlST 207 



remained until August 1st. It was most fortunate that we had this 

 aid from the Federal government, as there was more work than this 

 office could accomplish. We were also benefited by the fact that 

 the Federal government supplied certain funds for the treatment of 

 public lands. In many instances the farmers were not willing to 

 treat their own lands unless the public lands in the vicinity might 

 also be treated, thus preventing the entrance of grasshoppers after 

 the farms had once been cleaned up. The assistants with Mr. Creel 

 were Mr. Rockwood and Mr. Taylor. 



KINDS OF GRASSHOPPERS IN THE OUTBREAK 



From the fragments of grasshoppers which were found in April, 

 which were the remains of those present the year before, it became 

 evident that the species concerned was the well-known lesser migra- 

 tory locust, Melanoplus atlanis Riley, or a closely related species, 

 and from the nymphs which were found during the early part of 

 the season we . had further evidence that the species concerned 

 belonged in the atlanis group. When adult grasshoppers, however, 

 began to emerge about July 8th, it was learned that they more 

 closely resembled the old Rocky Mountain migratory locust which 

 fifty years ago wrought extensive damage in the northwestern States. 

 As more and more of the insects reached the adult condition it was 

 evident that the great mass of them belonged to this form. Accord- 

 ingly, large numbers of the specimens were taken for future study. 



We cannot say definitely at this time just what species this 

 grasshopper is. However, for present purposes it is enough to say 

 that, if it is not the Rocky Mountain migratory locust, it is very 

 closely related to it. It is a long-winged form and a good flier. We 

 did not witness any extensive migrations of the species, but such 

 migrations were reported by the residents. 



It is of much importance to determine as soon as possible 

 whether or not it is the destructive species of fifty years ago for it 

 is desirable to know whether potentially this grasshopper is as 

 injurious as that one. Accordingly, an effort will be. made to deter- 

 mine more closely the specific identity of this insect. 



NATURAL ENEMIES 



. In our journeyings through the region affected by this grass- 

 hopper we watched for the parasites which might be of service in 



