370 PROCEEDINGS OF THE ACADEMY OF [Sept., 



On geyser formation, ]\Iammoth Hot Springs, Aug. 5, 1 9 . Top of 

 bare hill opposite Devil's Kitchen, Mammoth Hot Springs, Aug. 5, 1 9 . 

 Meadows near Norris Pass, Continental Divide, Yellowstone Park, 

 Aug. 5, 1 9 . Near Grand Caiion, Yellowstone Park, Aug. 10, 2 c^. 



These specimens have the caudal tibiae with pale proximal annuli 

 followed by dull glaucous and with the distal third reddish. 



This species is distinctly boreal and apparently uncommon in 

 collections, the only definite records being from Fort McLeod, southern 

 Alberta, several localities in Idaho, Fort McKinney,. Wyoming, and 

 Estes Park, Colorado. Individuals from all except the Idaho localities 

 have been examined. 



The specimens taken were all found among the more boreal forms of 

 vegetation in the Park. Nowhere was it possible to take a large 

 series of specimens, in spite of the fact that when found individuals 

 were easily captured. The insects move about quite hurriedlj^ on 

 the ground, and when disturbed can also use their wings advantage- 

 ously. 



GOMPHOCERTJS Thunberg. 

 Gomphocerus clavatus Thomas. 



^lammoth Hot Springs, Yellowstone Park, Aug. 5,6 9 . Summit 

 of foothill of Gallatin Range, Mammoth Hot Springs, Aug. 5, 1 9 . 

 Manitou, Colorado, 6,800-7,000 feet, Aug. 23, 2 d', 5 9. Pike's 

 Peak, 10,200 feet, Aug. 20, 1 9 ; Dark Canon, 8,920-9,000 feet, Aug. 16, 8 

 c? , 4 9 ; above Windy Point, 12,300 feet, Aug. 20, 16 d' , 8 9 , 6 nymphs ; 

 below Windy Point, 12,000 feet, Aug. 20, 6 c? ; along timber line, 

 11,578 feet, Aug. 20, 1 d' ; Mountain View, 9,700 feet, Aug. 20, 2 c?, 5 9 . 



With this series of nearly seventy specimens, and twenty others in 

 the collection of the Academy, we are unable to find any constant 

 character or characters to separate the three so-called American species 

 of this genus. We have attempted to apply the characters given by 

 Bruner^ to distinguish them, but the Windy Point series exhibits 

 enough variation to prove the futility of attempting to recognize 

 several species. The length of the antennje and the angulation of 

 the fastigium vary to a great extent, and the inflation of the cephalic 

 tibiae of the males apparently is as variable as in the European species 

 of the genus. 



I found this species by no means abundant about the Mammoth 

 Hot Springs, but took it in both the highest and lowest locations. On 



' Biol. Cent.-Amer., Orth., II, pp. 92, 93. 



