DESCRIPTIONS OF APPARENTLY NEW SPECIES AND SUB- 

 SPECIES OF MAMMALS FROM OKLAHOMA TERRITORY. 



BY D. G. ELLIOT, F. R. S.E. 



i. Neotoma macropus surberi, subsp. nov. 



Type locality. Canon three miles west of Alva, Oklahoma Ter- 

 ritory. Adult $. Collected February 20, 1899, by Thaddeus 

 Surber. 



Characters. Similar to N. macropus, and N. m. canescens, but 

 darker above, with a longer tail having the upper part almost 

 black. 



Color. Entire upper parts of body, and forelegs, and flanks, 

 iron gray, the hairs tipped with white. Top of head same color, 

 but the cheeks a paler gray. Under parts white, hairs of chin, 

 throat, breast and space between hind legs, white to the roots, 

 those of remaining portion plumbeous at base. Hands and feet 

 pure white to wrists and ankles. Tail long, above grayish 

 black on basal third, almost pure black for remaining parts. 

 Sides and under parts pure white. Ears slightly covered with 

 brownish-black hairs, the bases hidden by tufts of iron-gray hairs. 

 Whiskers long, black with a few white bristles intermingled. 



Cranial characters. The skull of the present sub-species is 

 considerably larger than that of N. micropus, even the female's 

 exceeding in size that of the male of that species. The inter- 

 orbital space, however, is narrower, the palate longer, as is also 

 the upper tooth row. The nasals also are longer and broader 

 anteriorly. Zygomatic width much greater, and the zygomatic 

 arch more square in outline posteriorly, the process of the 

 squamosal projecting outward and then at a right angle forward. 



Measurements. Total length, 430 mm. Tail, 197. Hind 

 foot, 43. 



Skull. Occipito-nasal, length, 50 mm. Basilar length of Hen- 

 sel, .43. Greatest zygomatic breadth, 28. Greatest mastoid 

 breadth, 20. Breadth across postorbital processes, 10. Least 

 inter-orbital breadth, 6.5. Palatal length, 10. Length of nasals, 

 20. Upper tooth row along alveolus, 10. Height of coronoid 



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