1908.] NATURAL SCIENCES OF PHILADELPHIA. 383 



From this evidence there appears but one conclusion to be drawn, and 

 that is to consider the different types forms of one species, as the 

 presence of a seventy-five per cent, intermediate series leaves open to 

 us only this solution or the most arbitrary allotment of this "mixed" 

 body. The latter course has nothing in its favor, as the definition of the 

 "species" would be a practical impossibility. 



The localities represented in the series at hand are Tucson, July 26, 

 four cJ*, twelve 9 ; Sonora Road Canyon, Tucson Mountains, July 25, ' 

 one 9 ; near Sonora Road, southwest of Tucson Mountains, July 25, 

 seven d^, five 9 ; Roeble's Ranch near Coyote Springs, July 24 and 

 25, twenty-eight 6^, forty-eight 9 . Typical huddiana was taken at 

 Tucson, near Sonora Road and Roeble's Ranch, ferruginea at Tucson and 

 Roeble's Ranch, maculipennis at Tucson and Roeble's Ranch and 

 texana at Tucson and near Sonora Road. 



This insect appears to be the most difficult to capture of almost any 

 of the desert species encountered, this being due to its remarkable 

 protective coloration and to its great swiftness in springing into the air 

 and taking flight. It was by all odds the most plentiful and widely 

 distributed desert species collected. 



AGENEOTETTIX McNeill. 

 Ageneotettix australis Bruner. 



An adult male of this species was taken in Sonora Road Canyon, 

 July 25, and an immature female at Roeble's Ranch, the same date. 

 The mature specimen was captured on the rocky canyon side. 



Ageneotettix ourtipennis Bruner. 



A female specimen from Bright Angel, altitude 7,000 feet, Septem- 

 ber 11, is referred to this species. The tegmina are very short, not 

 more than one-third the length of the abdomen, and the caudal tibiae 

 have the proximal third ochraceous clouded and sprinkled with 

 fuscous. The original locality for this species was simply "Southern 

 Colorado," and in consequence this is the first definite record for the 

 species. 



The specimen was found on stony ground, among low plants in a 

 forest of pinon and juniper, where Amphitornus nanus was the only 

 other species of Orthoptera seen. 



ATJLOCARA Scudder. 

 Aalooara rufum Scudder. 



A single male of this species was taken in Sonora Road Canyon, 

 Tucson Mountains, July 25. 



