54 BULLETIN NO. 4, DIVISION OF ENTOMOLOGY. 



their movements were in unison, but not extensive, their flights being 

 very short. 



The average elevation of Taos Valley is about 7,000 feet. Not a sin- 

 gle specimen, young or old, of this insect was observed from the time 

 of leaving Poudre Canon to the time of reaching Laramie City on the 

 10th of July, nor have any been seen or heard of since. While in North 

 Park, Mr. Capern stated that but few had been observed by him since 1879 

 and. 1880, when quite a number had hatched in portions of the park j 

 and it was during these years that they were frequently seen in the air, 

 floating with the wind. From Laramie and Rock Creek, north, we were 

 ever on the lookout for signs of this insect, but failed to see any before 

 reaching Fort McKinney. At this place we succeeded in capturing two 

 fledged specimens and saw but one or two others. We did not ascer- 

 tain much about their past ravages in this part of the country more 

 than that, in 1877, they had been seen in the air in great numbers j 

 also in 1876, and once or twice previous to this, when they flew in great 

 numbers, and occasionally were noticed piled up in heaps upon the snow 

 on the mountains where they fell as they became numbed while trying 

 to cross the range. Again at Custer's battle-field we saw two or three 

 more among the numerous other species of locusts that abounded 

 among the rich grasses of the bottom lands and coulees, as well as 

 lower hillsides. At Junction, on the Yellowstone River, none of this 

 insect were noticed, though several allied forms were abundant both on 

 the river bottoms and among the sage-brush and bunch -grasses back 

 among the hills and on the bench-lands. At Livingston, where the 

 railroad leaves the Yellowstone Valley, we noticed a great number of 

 locusts, which, when I first saw them from the car windows, jumping 

 about in the grass, I took for this species. Upon going out, the mistake 

 was quickly observed. While there did not appear to be any G. spretus 

 among the hosts of locusts, there were quite a large number of Camnala 

 atrox, or pellucida. I also observed several of this species here in the 

 vicinity of Bozeman (August 3). I have not, however, been able to 

 learn of any damage having been committed by them in this valley 

 the present season. Since leaving Bozeman, and while crossing the 

 country along the Yellowstone River, we did not observe a single 

 specimen of C. spretus, either old or young, in the air or on the 

 ground. During past years, however, they were reared in great num- 

 bers throughout the National Park and Upper Snake River valleys 

 when, at times, they were numerous enough to " almost obscure the 

 sun " ; at least I was so informed by a Mr. Livermore, who has a ranche 

 at Henry's Lake. 



As to dates and particulars of flights, &c, he was not certain ; 

 therefore I can give none of these. As we proceed down the valley of 

 Henry's Fork toward the Snake River there is a great tract of country 

 crossed that at times has been the originating center for the great 

 swarms that came into Cache Valley and other portions of northern 





