June, 1903. A List of Mammals — Elliot. 217 



hesitation, for while some are exactly like that species others resem- 

 ble very closely JV. felipensis. It would not seem probable that the 

 latter form would range in the mountains so high above the desert, 

 nor that the two would be present in the same locality and remain 

 distinct. For the present I have left them under intermedia. 



Neotoma bella felipensis, subsp. nov. 



20 Specimens: 16 San Felipe, Gulf of California; 4 Palomar, 

 Hanson Laguna Mountains. 



Type locality. San Felipe, Gulf of California, Lower California. 



Genl. Char. Largest of the pale colored desert rats ; nearest to 

 N. bella; feet and ears larger, tail longer. Skull with shorter and 

 broader nasals, shorter pterygoid fossa, wider basioccipital and 

 basisphenoid; bullae much smaller; brain case much narrower pos- 

 teriorly. 



Color. Similar to N. bella, cream-buff lined with black on the 

 upper parts, sides pale cream color; lips, hands, feet, lower portion 

 of sides and under parts pure white; basal part of hairs on side and 

 under parts plumbeous, except on chin, center of breast, and a line 

 down the center of abdomen to anal region which has the hairs white 

 to the roots; tail dusky above, whitish beneath; ears pale brown. 



Measurements. Total length, type, 335; tail vertebras, 158; hind 

 foot, 34; ear, 34. Skull: occipital nasal length, 41; Hensel, 34; 

 zygomatic breadth, 21; interorbital constriction, 5; width of brain 

 case at root of zygomata, 18; posterior width, 14; palatal arch to 

 alveoli of incisors, 19; postpalatal length, 15; median length of nasals, 

 15; posterior width of nasals, 2.5; anterior width of nasals, 4.5; palatal 

 arch to hamular process of pterygoids, 7; width of basioccipital 

 anteriorly, 8; width of basisphenoid at anterior point of bullae, 4; 

 length of upper molar series, 7; length of mandible, angle to alveolus 

 of the incisor above, 23; height at condyle, 11; at coronoid process 

 12.5; length of lower molar series, 8. 



In general appearance there is not much difference in color be- 

 tween the present form and N. bella from Palm Springs, southern 

 California. A series of topotypes of N. bella are before me and by 

 color alone it would be difficult to separate the Lower California 

 specimens from them, but the latter are generally larger in adult 

 animals, with longer ears, hind feet and tail, and the difference in 

 the proportion of the skull seems to warrant their separation. From 

 N desertorum (two specimens of which, topotypes, were kindly loaned 

 to me by Dr. A. K. Fisher, Acting Chief of the Biological Survey, 

 Washington, together with a skull of N. d. sola), the San Felipe 



