396 PROCEEDINGS OF THE ACADEMY OF [Julj, 



there is an appreciable amount of individual variation, the extremes 

 of the series measuring as follows : 



The coloration is quite uniform, only a few specimens being more 

 richly colored than the others, the caudal femora, however, being 

 some shade of glaucous in all the series instead of ''yellowish brown" 

 as originally described. 



The female specimen recorded by Rehn as M. canonicus? from 

 Florence, Arizona,^" and those of the same sex from the Huachuca range 

 recorded by him as M. flavidus^^ are referable to this species. The 

 absence of accompanying males was responsible for the erroneous 

 identifications. The Florence individual has since been compared 

 with the types of brownii. 



The range of this species now extends from Yuma up the Gila Valley 

 to Phoenix and Florence, southward to Tucson, the Baboquivari and 

 Huachuca Mountains. 



The species was found at Tucson, frequenting high weeds near water 

 and cultivated areas. 

 Melanoplus atlanis (Riley). 



A male and two females represent this widely distributed species, the 

 localities being Williams, September 13 (d"), Tucson, July 26 ( ? ), and 

 SonoraRoad near Tucson Mountains, July 25 (9 ). These specimens are 

 distinctly larger than eastern individuals of the species, a fact previously 

 noted by Rehn^^ in regard to Florence and Phoenix, Arizona, repre- 

 sentatives. The Sonora Road specimen has the coloration strongly 

 contrasted. 



Melanoplus aridus (Scudder). 



A very interesting series of this species was taken at localities in 

 northern Arizona, a region from which it was previously not reported. 

 Nine specimens from Williams, September 13, five males, four females, 

 average about equal in size to individuals from Florence, Arizona, and 

 are distinctly smaller than Scudder's measurements. Three males 

 and one female taken at Anita, September 11, show a further reduc- 

 tion in size, while a series of fourteen males and eleven females from 



10 Proc. Acad. Nat. Sci. Phila., 1904, p. 572. 



" Ibid., 1907, p. 54. 



« Proc. Acad. Nat. Sci. Phila., 1907, p. 78. 



