404 PROCEEDINGS OF THE ACADEMY OF [Sept., 



Measurements. 



Length of body, 20 mm. 23 mm. 



Length of pronotum, 4.8 '' 5.5 " 



Length of tegmen, A " 5 " 



Length of caudal femur, 10.5 " 12 " 



The type specimens are unique. 



These two specimens were taken on the pebbly summit of the foot- 

 hills back of the Mammoth Hot Springs Hotel. The ground in this 

 region was quite bare, but few plants being noticed. 

 Podisma oregonensis (Thomas). 



The following localities are represented, all in Yellowstone Park: 



Mammoth Hot Springs, Aug. 5, 4 cJ^, 1 ? . Summit of first foothill 

 of Gallatin range, Mammoth Hot Springs, Aug. 5, 4 d^, 8 9 . Con- 

 tinental Divide near 8,300 feet elevation (alpine meadow), Aug. 7, 

 1 d^. ApoUinaris Spring, Aug. 6, 1 9 . Yellowstone Lake, Aug. 7, 

 8 d", 7 ? . Near Grand Caiion, Aug. 10, 10 d", 4 ? . 



The specimens from the higher altitudes, as the Continental Divide 

 and Grand Canon representatives, average smaller than the individuals 

 from lower altitudes. One male from Mammoth Hot Springs is 

 partially covered with geyser deposit and is larger than any repre- 

 sentative of the same sex (d*) seen. In coloration some specimens 

 have the paler markings more brilliant than in others, and some few 

 individuals from Grand Canon are suffused with smoky brown. 



This species appeared to be widely distributed and was found quite 

 plentiful in the short grass of all the elevated open lands in the Park. 

 The species was strictly terrestrial, and individuals were invariably 

 active and possessed of considerable saltatorial power. 



MELANOPLUS Stil. 

 Melanoplus lakinus (Scudder). 



Knob Hill, Colorado Springs, Colorado, Aug. 17 to 22, 6 d^, 4 9 . 

 , Prairie land, Colorado Springs, Aug. 18, 1 d^, 1 9. Fort Morgan, 

 Colorado, Aug. 24, 11 d*, 8 9 . Akron, Colorado, Aug. 24, 2 d". 



Several of the above specimens belong to the richly colored green 

 phase described by Gillette. 



In all the localities in which I collected on the Colorado prairie where 

 the vegetation was high and rank, I found this beautiful species in 

 moderate numbers. The individuals were very active, but could be 

 easily beaten from the weeds in which they had taken refuge. The 

 green form was noticeable for its brilliancy, 

 Melanoplus occidentalis (Thomas). 



Emigrant, Montana, Aug. 4, 1 d^, 2 ? . Knob Hill, Colorado 



