2o6 Field Museum of Natural History — Zoology, Vol. XI. 



^ Scotoma pennsylvanica 



OF mEX 



Area of Intergradatlon 



Map illustrating approximate distribution of Wood Rats (.Neotoma) in eastern United States. 



Neotoma pennsylvanica* Stone. (Proc. Acad. Nat. Sci. Phila., 1893, p. 16.) Type 

 locality — South Mountain, Cumberland Co., Pennsylvania. Total length 

 about 16.50 in. (418 mm.); ears large; color dull brownish plumbeous, above 

 mixed with black hairs; feet and under parts white; tail bicolor, above brown, 

 under surface white; first upper molar with anterior inner notch or angle, deep, 

 extending more than half way across the lobe. 



Neotoma floridana (Ord). (Bull. Soc. Philom. Paris, 1818, p. 181.) Type locality — 

 St. John's River, Florida. Smaller than pennsylvanica and more plumbeous, 

 tail less thickly haired; skull slighter; first upper molar with anterior inner 

 notch or angle, shallow, extending less than half way across the lobe. 



Neotoma f. attwateri (Mearns). (Proc. U. S. Nat. Mus., XIX, 1897, p. 721.) Type 

 locality — Lacey's Ranch, Turtle Creek, Kerr Co., Texas. Similar to floridana 

 but pelage longer and grayer in summer; tail less than 6% in. (175 mm.). 



* Neotoma magister Baird, described from lower jaws found in Pleistocene cave 

 deposits near Carlisle, Pennsylvania (Baird, Mammals N. Amer., 1857, p. 498), is 

 regarded by Goldman as distinct from N. pennsylvanica (N. Amer. Fauna, No. 31, 

 1910, p. 83). 



