298 FIELD COLUMBIAN MUSEUM ZOOLOGY, VOL. i. 



which they had deserted for higher cooler buttes. At one place 

 I took a male and female (adults) and 3 young, which probably 

 represented an entire family, but usually no more than one was 

 taken in a place. My second visit to White Horse Spring was 

 made for the purpose of crossing into the hills 20 or 25 miles south- 

 west of that point and south of the Cimarron River, but unfortu- 

 nately on the day of my arrival at White Horse the river came 

 down with a "head rise," and by the next day was out of its 

 banks. I waited five days for it to fall so as to be crossed safely, 

 but at the end of that time it showed no signs of receding, so not 

 wishing to remain at White Horse longer I returned to Alva. I 

 was anxious to find how far south of the Cimarron this species 

 could be found, for from what I was told I believe its range ex- 

 tends to the westward from about Alva, between the Salt Fork 

 River on the north and the Cimarron on the south. I failed to 

 get any specimens east of Alva, so believe it ranges no farther 

 east than that point." (T. S.) 



Neotoma bayleyi. 



Neotoma bayleyi. Merr. Proc. Biol. Soc. Wash., 1894, 

 p. 123. 



Ten examples. 4 from Noble, Oklahoma Territory, and 6 

 from Dougherty, Indian Territory. 



While resembling very closely in general appearance N.floridana 

 Say and Ord, this rat can readily be distinguished by its shorter 

 tail and the greater size of the molar teeth. " I found a colony of 

 Neotomas in the cliffs east and north of Dougherty, out of which 

 I secured five specimens. They apparently carried no sticks 

 into their dens, as is usually the case, and might have been tran- 

 sient visitants to this ledge of rock. However, they had been 

 feeding largely on the acorns of the post-oak or black jack, as 

 gallons of the empty shells testified. The sixth wood rat was 

 taken along a rail fence surrounding a cotton field, in a trap set 

 in a pile of brush. From the immense number of cliffs in the 

 Arbuckle Mountains I should judge it to be a fine locality for 

 this species, but they were not very common near Dougherty." 



(T. S.) 

 Microtus (Pedomys) austerus. 



Microtus austerus. Le Conte Proc. Acad. Nat. Sci. Phila., 

 1853, p. 405. 



Thirteen examples. Alva, Oklahoma Territory. 



"Meadow voles, were found later on the river bottom and 



