1914.] NATURAL SCIENCES OF PHILADELPHIA. 11 



Tomes' type was also obtained there. While the latter is probably 

 not absolutely identifiable after this lapse of time, it seems best to 

 retain his name ininutus for this form. The animal is a little smaller 

 than Mus miisadus and almost exactly the same color below, while 

 above it is very much more rusty with a clearer line of demarcation 

 on the side. The ground color above, at the base of the tail where 

 it is purest and brightest, is "tawny ochraceous" of Ridgway's Color 

 Standards 1912, but is duller and browner on the back and head and 

 thickly mixed everywhere with black hairs. 



6. Eeithrodontomys soderstromi Thomas. 



Reithrodontomys Soderstromi Thomas, Ann. and Mag. Nat. Hist., 1898 (I), 

 p. 451. (Quito.) 



Four specimens obtained from Mr. Soderstrom, who collected 

 them at or near Quito, and one obtained in Quito by Mr. Rhoads^ 

 April 25, ad. 9 , length 185 mm., tail 105, hind foot 20, ear 14.5. 



7. Phyllotis haggardi Thomas. 



Phijllotis Haggardi Thomas, Ann. and Mag. Nat. Hist., 1898 (II), p. 270- 

 (Mt. Pichincha.) 



One immature female (12,697, Coll. A. N. S. Phila.) obtained at 

 Hacienda Garzon at the southern foot of Pichincha, at 12,000 feet, 

 nearly up to the paramo, IVIay 12, 1911. 



It agrees very well with Thomas' description, excepting that the 

 tail is only 50 mm. in length, whereas that of the type measured 

 86 mm. 



8. .Slpeomys vulcani (Thomas). 



^peomys vulcani Thomas, Ann. and Mag. Nat. Hist., 1898 (I), p. 452. 

 (Mt. Pichincha, 12,000 feet.) 



A partially mummified skin (12,698, Coll. A. N. S. Phila.) ol)tained 

 from Mr. Soderstrom, collected on the west side of Mt. Pichincha. 

 Thomas seems to have made a mistake in citing the tail as "barely 

 as long as the head without the body," since a few lines below he 

 gives length of "head and body 111 mm. and tail 84 mm." The 

 measurements are probably correct as given, since our dried specimen 

 is 100 mm. long exclusive of the tail which measures about 72 mm. 



9. Thomasomys paramorum Thomas. 



Thomaaomys paramorum Thomas, Ann. and Mag. Nat. Hist., 1898 (I), 

 p. 4.53. (Paramo, south of Chimborazo.) 



Ten specimens obtained on the paramo of Mt. Pichincha are 

 apparently referable to this species, obtained originally in a similar 

 region near Mt. Chimborazo. 



They are almost exactly like the much smaller Oryzomys minutus 

 in color, both above and below. 



