' Vol, XXII, pp. 139-142 June 25, 1909 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



^'^"flVE NEW WOODRATS OF THE GENUS NEOTOMA 

 '^ ■ FROM MEXICO. 



BY E. A. GOLDMAN. 



Recent study of the large series of woodrats in the Biological 

 Survey Collection has resulted in the discovery of four unde- 

 scribed subspecies — three members of the Neotoma intermedia 

 group, and a high mountain form of Neotoma ferruginea. Through 

 the kindness of Mr. Outram Bangs I am able to include also a 

 description of a well-marked species collected for Mr. John E. 

 Thayer, on the small island of San Francisco in the Gulf of 

 California. 



Neotoma intermedia pretiosa subsp. nov. 



Type from Matancita (called also Soledad), 50 miles north of Magda- 

 lena Bay, Lower California, Mexico (altitude 100 feet). No. 146,123, 

 U. S. National Museum, Biological Survey Collection, c? adult. Col- 

 lected November 17, 1905, by E. W. Nelson and E. A. Goldman. Orig- 

 inal number 18,589. 



General characters. — Size much larger and color paler than N. inter- 

 media. Similar in size to N. i. arenacea, but color paler; tail shorter; 

 audital bulla? larger. 



Color. — Worn pelage: Upper parts very pale drab gray, purest along 

 cheeks and sides, overlaid on top of head and back by dusky or rusty 

 hairs; feet and underparts white; tail blackish above, grayish below. 



Skull. — Similar in general to that of N. intermedia, but very much 

 larger and more angular ; supraorbital ridges more prominent. In size 

 the skull is similar to that of A". /. arenacea, but dentition heavier; bullse 

 much larger. 



Measurements. — Average of 6 adult topotypes: Total length, 374; tail 



vertebra?, 166; hind foot, 39.3. Skull: Basilar length, 39.4; zygomatic 



breadth, 24.6; length of nasals, 18.2; alveolar length of upper molar 



series, 9.3. 



Neotoma intermedia perpallida subsp. nov. 



Type from San Jose Island, off east coast of Lower California, INIexico. 

 21— Peoc. Biol. Soc. Wash. , XXII. 1909. (139) 



