1908.] NATURAL SCIENCES OP PHILADELPHIA. 397 



the rim of the Grand Canyon at Bright Angel, September 11, are veiy 

 decidedly smaller than Scudder's measurements, some specimens 

 being hardly more than half the size given by him. The senior author 

 recently called attention^^ to the size variability of this species, citing 

 Huachuca Mountain individuals larger than the original measure- 

 ments. 



The coloration of the Grand Canyon series shows little yellowish, 

 having grays and gray-browns predominating, while the Anita and Wil- 

 liams specimens are somewhat brighter, though by no means as strik- 

 ingly colored as Florence, Arizona, individuals. The yellow of the 

 ventral surface is pure in some specimens and much soiled and washed 

 with red brown in others. 



At Williams and Anita this species was extremely common in the 

 grassy open glades of the pine forest, while at Grand Canyon it was the 

 most abundant species of Orthoptera and was found ever3Awhere in the 

 undergrowth of the heavier pine woods. It was noted to be a very 

 swift jumper, but a series was easily taken on account of its abundance. 

 Melanoplus femur-nigrum Scudder. 



This little known species is represented by a series of two males and 

 three females taken September 11 at the rim of the Grand Canyon at 

 Bright Angel. Here it was taken on an open hillside heavily over- 

 grown with a plant resembling rabbit-weed. 



The only previous record of this species is the original one from 

 San Francisco Mountains, July 30, but its range is more extensive as 

 witnessed by a female in the Academy Collection labelled "Albu- 

 querque, N. Mex., July 13, Oslar." It is quite probable that this 

 specimen was taken in the mountains near Albuquerque, as it is hardly 

 likely to occur in the distinctly Sonoran vicinity of the city. 

 Melanoplus femur-rubrum (DeGeer). 



A male of this species was taken at Winslow, Navajo County, 4,848 

 feet elevation, September 13. 



Melanoplus canonicus Scudder. 



A series of two males and seven females, taken September 12 along 

 or near the Bright Angel Trail, Grand Canyon, represent this species. 

 These specimens were taken at altitudes ranging from 4,850 to 6,800 

 feet, one female alone being from above an elevation of 5,800 feet. 

 The species was found only in scattered growths of pinon and juniper, 

 exhibiting a preference for the latter tree. Specimens were found 

 on the ground, in bushes and chnging to the twigs of juniper. 



13 Proc. Acad. Nat. Sci. Phila., 1907, p. 51. 

 26 



