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rado, the same author mentions that the species occurs in 

 the parks, another species being there characteristic of 

 the timbered mountainous region. Mr. Allen also found 

 it "more or less common everywhere" in sonthwestern 

 Wyoming, and extremely abundant in certain h)calities. 

 To conclude with this gentleman's observations, he fur- 

 thermore noted its common presence in the valle}' of the 

 Salt Lake, Utah, where, as in Kansas, it is associated 

 with L. caUotis. So far as we have gone, we now see that 

 the animal inhabits the prairie region of more than the 

 northern half of the United States, from the eastern limit 

 of the great plains westward. Our advices from west of 

 the Rocky Mountains are equally explicit. Dr. Suckley 

 reports it from the Blue Mountains of Oregon, and Mr. 

 George Gibbs states that it is common on the plains of 

 the Columbia east of the Cascades. In California, Dr. 

 Newberry has indicated the limit of the range, at the 

 point where the species is replaced by the ordinary "jack- 

 ass" of that state, L. californiciis. "The Prairie or 

 Townsend's Hare is unknown in the valleys of California, 

 though we found it a short distance south of the parallel 

 of 42°, so that it may be said to inhabit that state. In 

 the upper part of the Sacramento Valley, and even in the 

 hills northeast of Fort Reading, we found the 'jackass 

 rabbit' (i. calif or nicus) everywhere abundant, the only 

 hare, in the common acceptation of the term, known to 

 exist there — L. ariemism, audubonii and trowbridgii 

 being all called rabbits. Crossing the 'divide' between 

 Lassen's butte, and coming down into the interior or Kla- 

 math basin, on the upper branches of Pitt River, we lost 

 sight of the Californian species, to see no more of it till 

 our return south months afterward. In its place another 

 species * * * began to be occasionally seen, at first 

 very rarely, afterwards oftener, as we approached the 



