18 PROCEEDINGS OF THE ACADEMY OF [Jan., 



Rio Grande tract and runs up between the Organ and the Sacramento 

 ranges, comprising the San Augustine plain. 



Highrolls is situated near the lower border of the Transition 

 zone, and possesses few types in common with Alamogordo, but shares 

 quite a number with Cloudcroft. The latter locality is situated in 

 heavy Canadian forests, throughout which are interspersed open glades. 

 The fauna and flora of Cloudcroft are pure Canadian, and the surround- 

 ing timlDerland is one of the most important sources of lumber in the 

 southwest. 



Considerable material other than that collected by the expedition was 

 examined in the preparation of this paper. In such cases full credit is 

 given to the sources from which these specimens were obtained. We are, 

 however, under especial obligations to Mr. Gerrit S. Miller, Jr., of the 

 United States National MiLseum; Dr. J. A. Allen, of the American 

 Museum of Natural History, New York, and Dr. C. Hart Merriam, 

 Chief of the Biological Survey, United States Department of Agricul- 

 ture, for the loan of specimens of mammals. 



While concurring in the identifications and statements contained in 

 the following pages, the authors would have it understood that Mr. 

 Rehn is responsible for the portion on mammals and Mr. Stone for the 

 birds and reptiles. 



MAMMALS. 

 Sciurus fremonti lyclinuclius n. subsp. 



Type: No. 11,105, Coll. Acad. Nat. Sciences of Philadelphia, c? 

 Forks of Ruidoso, Lincoln county, N. M. August 18, 1898. Collected 

 by C. M. Barber. 



Related to S. f. ncomexiccntus Allen, but differing in the larger size, 

 more rufous coloration and in the much more elongate nasals. 



Distr ibid ion. — This form is at present represented only by material 

 from the White ^Mountain region, but probably occurs also in the Cap- 

 itan and Sacramento sections. 



Color. — Above dull ferruginous, strongest on the median section, the 

 color clearer and most intense on the rump, where the usual faint black- 

 ish vermiculations are almost absent. Sides above the lateral line 

 pale rufescent with an ochraceous tinge; lateral line narrow, not very 

 distinctly defined and with many ochraceous hairs intermingled. 

 Head washed with blackish, the orbital ring clear white; ears externally 

 ferruginous touched with blackish at the apex, which bears a scant pen- 

 cil. Fore limbs clear rufescent above, the lateral fringe of the feet sil- 

 very white. Hind limits dull ferruginous, becoming rufescent on the 



