1919.] NATURAL SCIENCES OF PHILADELPHIA. 79 



one, apparently responding readily to environmental influences, 

 in modifications of both structure and coloration. None of these 

 tendencies, however, seem well enough established or as constant 

 as would be required of such differential features to form adequate 

 bases for naming geographic races. The southern Arizonan (Babo- 

 quivari Mountains) material is the more strikingly isolated of 

 these, in its generally blunter fastigium, somewhat more robust 

 form and prominent coloration features. However, as we have 

 shown above, this material itself varies appreciably, and is vir- 

 tually connected with the more normal condition by a number of 

 individuals from component series of the representation before 

 us. Until we know more concerning the species in the south- 

 western portion of its range, its variation there and the geographic 

 extent of the tendencies shown by our small Baboquivari series, 

 it is inadvisable to propose a racial name for this material. The 

 future may show the desirability of such action, but at this writing 

 the evidence does not warrant it. 



Specimens examined: 248; 152 males, 87 females, 2 immature 

 males, 7 immature females. 



Illinois: Havana, Mason Countv; (J. D. Hood); 1 cf , 1 9 ; 

 [U. S. N. M.]. Bishop, Mason CJunty; VIII, 13, 1907; 1 cf" ; 

 [111. State Lab. Nat. Hist.]. 



Iowa: Hamburg, Fremont County; IX, 2, 1914; (M. P. Somes); 

 2 9 ; [Somes Cln.]. 



South Dakota: Hot Springs, Fall River County; X, 1888 

 (one specimen); 1 cf, 1 9 ; [Hebard Cln.]. 



Nebraska: Sidnev, Chevenne County, elevation 4100 to 4300 

 feet; VII, 30, 1910; (R. & H.; on top and slopes of bluffs of Lodge 

 Pole Creek); 2 d". Southwest Nebraska; 2 9; [Hebard Cln.]. 



Kansas: Hill City, Graham County; 1910; (C. E. McClung) ; 

 1 immature d" ; [McClung Cln.]. Graham County; (C. E. Mc- 

 Clung); 1 cT, 1 9; [McClung Cln.]. Russell, Russell County; 

 (C. E. McClung); 2 c^, 1 9 ; [McClung Cln.]. Dorrance, Russell 

 County; 1908; (C. E. McClung); 2 c^ ; [McClung Cln.]. Wilson, 

 Ellsworth County; 1910; (Pinney) ; 1 c^ ; [McClung Cln.]. WeUing- 

 ton, Sumner Countv; (E. G. KelljO ; 1 cf ; [Somes Cln.]. Dick- 

 inson County; 1908"; (Robertson); 3 d" ; [McClung Cln.]. Rich- 

 mond, Franklin County; 1910; (Taylor); 1 d" ; [McClung Cln.]. 

 Kingman, Kingman County; 1911; (E. Carothers) ; 1 cf ; [McClung 

 Cln.]. Barber County; (F. W. Cragin); 1 d', 3 9 ; [Hebard Cln.].^* 

 Dodge City, Ford County, elevation 2500 feet; IX, 13, 1909; 

 (H.; very plentiful in areas of short grass); 10 cf , 2 9 . Syracuse, 

 Hamilton County, elevation 3230 feet; IX, 12, 1909; (R. & H.; 

 in short prairie grass); 3 cf, 12 9. 



^^ Previously recorded by Bruner. 



