354 3Ir. O. Thomas 07i 



extreme variety of M. interstitialis. A fresh descrijjtioii 

 is not required. 



M. rufiventrisj Boh. (No. 14, p. 171). The type, c?, agrees 

 with the specimens thus named in my " Notes." 



The revised synonymy will stand as follows : — 



4. M. limhata, Paring. (1885). 

 rufomarginata (Dej. Cat.), Champ. (1919). 



5. M. puhescens, Oliv. (1790). 

 Ii7ieata, Fabr. (1792) (nee Champ., 1919). 



6. J/. sulcicoUis, Boh. (1851). 

 lineata (¥.), Champ. (1919). 



12. M. natalensis, Boh. (nee Champ., 1919). 



13. M. interstitialis (Dej. Cat.), Champ. (1919). 



sulcicoUis and var. varipes, Champ, (nee Boh.). 

 Var. natalensis, Champ, (uec Boh.). 



XXXIII. — Ntio Cryptotis, Thomasomys, and Oryzomys 



from Colombia. By Oldfield Thomas. 



(Published by permission of the Trustees of the British Museum.) 



By the kindness of Fr^re Niceforo Maria of the Colegio de 

 San Jos^, Medellin, the British Museum has been enabled to 

 acquire by exchange a number of small mammals from the 

 neighbourhood of that town. Among them there occur 

 examples of the three following new species : — 



Cryptotis medel/iniiis, sp. n. 



Most nearly allied to C. rneridensis ; larger than C. thomasi 

 and equatoris. 



Size about as in rneridensis^ the skull slightly shorter, but 

 more robust. Proportions about as in that animal, though 

 the tail of the single specimen is a little shorter. Fur as 

 usual, hair of back about 4"8 mm. in length. General colour 

 dark mouse-grey, less brown than in the other three 

 S. American species. Ends of digits, both fore and hind, 

 whitish. Tail with a few whitish hairs terminally, otherwise 

 dark brown. 



