LEPOKID.E— LETOS CALLOTIS ET VAR. 



355 



of the plains east of the Rocky Mountains. Dr. Cooper gives its western 

 limit in latitude 35° as the Colorado River. I have observed it on the plains 

 of Western Nebraska and Middle Kansas; and there are specimens in the 

 collection from as far east as Austin, Texas. It does not appear to overlap 

 the range of Lepus californicus, but extends over the southern half of the 

 range of Lepus campestris. Toward the Mexican border, especially in Texas, 

 it begins to very generally take on the distinctive features of variety callotis. 



The habitat of Lepus callotis var. callotis extends from about the southern 

 boundary of the United States far southward into Mexico, there being speci- 

 mens in the collection from Orizaba and Tehuantepec; and De Saussure 

 mentions it as being common in the province of "Mechoacan'', in about lati- 

 tude 19°. 



Table XLIX. — Measurements of Lepus callotis. 



* Rather yoniig. 



