The American Voles of the Genus Evotomys. 125 



Evotomys gapperi rhoadsi Stone. 

 Evotomys gapperii rhoadsii Stone, Am. Nat., vol. XXVII, p. 54, Jan., 1893. 



Type locality. Mays Landing, New Jersey. 



General characters. Similar to typical gapperi but with slightly darker 

 dorsal stripe, less buffy sides, slightly shorter tail, and larger hind foot. 

 The body measurements, as well as the skulls, show the animal to be 

 identical in size with gapperi, the difference in dimensions appearing 

 only in length of tail and foot. 



Color. Dorsal area, extending from between eyes to base of tail, plain 

 chestnut; sides buffy gray ; belly washed with buff or whitish ; tail, feet, 

 and ears as in gapperi. 



Measurements. Average of 3 young adults from type locality, measured 

 in the flesh by J. Alden Loring: total length, 139.3; tail vertebrae, 36; 

 hind foot, 20. Skull (adult ^, No. 76679) : basal length, 21.5; nasals, 7; 

 zygomatic breadth, 13.5 ; mastoid breadth, 11.3 ; alveolar length of upper 

 molar series, 5.2. 



General remarks. Three adult topotypes collected by J. Alden Loring 

 at Mays Landing, New Jersey, February 29 and March 1, agree in part 

 with the original description of the subspecies. The slight shortness of the 

 tail compared with that of typical gapperi is entirely within the range of 

 individual variation and discrepancies in methods of taking measure 

 ments. If a more extensive series of specimens should prove the color 

 and foot characters inconstant, the subspecies will have to be given up. 

 With the material in hand I prefer to retain it, though other more 

 marked forms remain unnamed. The nearest localities to Mays Land 

 ing, N. J., from which I have examined specimens of Evotomys are Wil 

 mington, Mass., and near Renovo, Penn. These specimens are fairly 

 typical gapperi with no tendency toward rhoadsi, and Mr. Rhoads has 

 recorded gapperi from northern New Jersey and from Monroe and Pike 

 counties, in northeastern Pennsylvania. 



Evotomys gapperi loringi,* subsp. nov. 



Type from Portland, North Dakota, No. 75795, $ ad., U. S. Nat. Mus., 

 Biological Survey Coll. Collected Nov. 22, 1895, by J. Alden Loring. 

 Collector's number, 3438. 



Geographic distribution. Timbered valleys along edge of plains in Min 

 nesota and eastern North and South Dakota. 



General characters. Smallest Evotomys known in America, with bright 

 coloration and narrow, slender skull. 



Color. Full winter pelage : dorsal stripe sharply defined, extending from 

 anterior base of ears back between ears to rump, pale reddish hazel, 

 scarcely darkened with black hairs and frosted from the presence of a 

 white subterminal zone. In some specimens with the maximum of white 

 the back is fairly hoary, in others the chestnut predominates and con 

 ceals the white zone. Face, sides, and rump, bright grayish ash, more 



* Named for the collector of the type series, Mr. J. Alden Loring. 



