66 PROCEEDINGS OF THE ACADEMY OF [Feb., 



these individuals are inseparable although both slightly smaller. An 

 additional female from Carr Canyon is placed under this species with a 

 query, agreeing in spine formulae with integer and pennsylvanicus, but 

 in general appearance and form similar to alogiis. The positive deter- 

 mination of species of this genus will probably be impossible until 

 extensive breeding experiments and careful quantitative studies of our 

 "species" have been made. 



CEcanthus niveus (DeGeer). 



Carr Canyon, Huachuca Mountains, August, 1905 (Skinner), 1 cJ*, 

 2 9 . Palmerlee (Schaeffer), 1 9 . 



OEcanthus nigricornis Walker. 



Carr Canyon, Huachuca Mountains, August, 1905 (Skinner), 3 ? . 

 September 30, 1905 (Biederman), 1 ? . Palmerlee (Schaeffer), 2 ? . 



These specimens are inseparable from a Monte Redondo, Costa Rica, 

 female. 



Caudell has recorded this species from the Huachucas. 



(Ecantlius argentinus Saussure. 



Carr Canyon, Huachuca Mountains, August, 1905 (Skinner), 3 c?, 

 2 9. October 16-17, 1905 (Biederman), 1 d". 



These specimens are assigned to this species with some little doubt, 

 as they agree fairly well with the original description of Saussure, but 

 do not tally so closely with the later one given by the same author.'^ 

 The antennal markings are similar to those originally described, but 

 have no supplementary spot or cloud on the first proximal joint as 

 later stated. In other characters these individuals agree very fully 

 with the 1897 description. The remarks made by CaudelP* regarding 

 Oracle and Hot Springs, Arizona specimens referred to this species are 

 substantiated by the material before me. 



II. Pima County. 



The specimens here treated were collected by Prof. F, H. Snow, of 

 the University of Kansas, during the summer of 1906. The localities 

 represented are the Baboquivari ]\Iountains and Tucson. The material 

 from the former locality is of very considerable interest as it has been 

 seldom visited and, as far as the author is aware, this series is the 

 first collection of Orthoptera made in that isolated locality. 



23 Biol. Cent.-Amer., Orth., I, p. 254. 

 2* Proc. Ent. Soc. Wash., V, p. 166. 



