



33 



which point a drive of 30 miles brought me to the Centennial Valley, 

 which lies to the westward of that town, near to the headwaters of the 

 Little Laramie River. Here Gamnula pellucida was quite abundant on 

 some meadows, but none of the other species were present even in mod- 

 erate numbers. No immediate danger need be anticipated from ('. 

 pellucida at this point. It and Melanoplus atlanis were also moderately 

 common in and about Laramie City. 



Through inquiries made at the University of Wyoming it was learned 

 that but few 'hoppers were reported from Wyoming points, save in the 

 region of the Big Horn Mountains, where a species of Anabrus was 

 very abundant and did some injury to crops and garden plants. This 

 insect was present in force both in the Big Horn Basin and on the 

 eastern slopes of the mountains bearing the same name. Specimens 

 were seen by me that were taken at Lander and at Sheridan. 



Locusts in rather large numbers were observed along the railroad 

 between Wasatch and Echo, a few just before reaching Ogden, and 

 larger numbers north of Ogden and before Brigham City was reached. 

 The most numerous species were M. bivittatus and M. atlanis, although 

 in some hayfields Gamnula pellucida was present in more than ordinary 

 force. 



Upon arriving at Logan it was found that the greater part of Cache 

 Valley was more or less overrun by locusts. At the agricultural col- 

 lege and experiment station some attention was being given to their 

 destruction and study. Here nearly all of the commoner species were 

 unusually abundant. Even Dissosteira Carolina, our common "dusty 

 road" grasshopper over the greater portion of the United States, was 

 present in numbers sufficiently great to do not a little damage to culti- 

 vated crops. Some wheat fields between Mendon and Cache Junction 

 seemed almost to swarm with them as they arose and flitted out of the 

 way of the moving train. The other species of locusts most abundant 

 in this particular region were M. bivittatus, M. fcedus, M. atlanis, M. 

 femur-rubrum, Gamnula pellucida, Dissosteira obliterata, and Arphia 

 tenebrosa. 



Judging from the large numbers of locusts of all sizes that had been 

 and were being destroyed by the Empusa gryllce, as well as by several 

 species of dipterous parasites, I imagine that the plague in the (ache 

 Valley is on the decline. Nevertheless, it would be well to be prepared 

 to use artificial remedies for their destruction in the near future. 



During my sojourn at Logan two of the field agents of the Division 

 of Botany visited this region, from whom it was learned thai locusts 

 were nowhere abundant in the parts of Montana where they had been. 

 Since these gentlemen are both good observers, 1 am fairly confident 

 that the valleys of the Madison, Jefferson, Gallatin, etc., are pretty free 

 from these insects. 



From the Cache Valley 1 next went to Pocatello, Idaho, where no 

 indications of locusts, even in ordinary numbers, were found. As near 

 8967— No. 7 :; 



