SCIENTIFIC RESULTS FROM THE MAMMAL SURVEY. l'O.S 



Hahitat. — Aiiiballa. l^^njab. Type from Haiidiser.ih. 



Typc.—0\d. male. JJ. M. No. "8.3.3.5. Original number 221). 

 Collected Gtli December 1907, and presented by Col. H. N. Dmm, 

 R.A.M.C. 



This subspecies differs from its near all}'- M. m. pallidior by its 

 more buffv coloration and shorter tail. 



((') — A NEW GENUS OF MURID^E. 



liY Oldfield Thomas. 

 (^rahlished hi/ pennission of (tie Trustees of the British Museum.) 



In the previoiis note mention was made of Hazaribagh as a 

 localit}^ for Millardia msltada meltada, a record resting; on a spe- 

 cimen (Collector's number 5127; B. M. No. 15.4.3.135), 

 obtained by Mr. Crump on Mt. Paresnath, at an altitude of 4,300', 



The specimen was determined as a Mettad b}^ Mr. Wroughton. 

 and was catalogued as such in his Report No. 19, on the Behar 

 Orissa collection. 



So far as the skin is concerned I cannot believe this determina- 

 tion to be incoiTect. Not only does the skin agree absolutely in 

 colour and proportions with typical meltada, but its foot-pads and 

 mammae are both as in that species. 



But the skull assigned to it is obviously.entirely different from that 

 of Millardia, and since the identity of the skin Avith Millardia seems 

 too complete to be due merely to accidental resemblance I suppose 

 the skull not to belong to it, and to need separate determination. 



Such determination however I quite fail to make, and now 

 consider the skull to represent a new genus, which may be called 



DiOMYS, g. n. 



External characters unknown (or, if I am wrong in the above 

 supposition, absolutely as in Millardia). 



Skull lightly built, its anterior part long, low and naiTOw, the 

 muzzle and nasals particularly long and narrow. Nasals abbre- 

 viated anteriorly so that the incisors and the front part of the nasal 

 chamber are visible in front of them from above. Interorbital 

 region of normal shape, the supraorbital ridges well developed, but 

 not excessively so. Zj'gomatic plate long horizontall}^ well project- 

 ed forwards, its anterior edge vertical. Anterior palatal foramina 

 veiy long, reaching well between the molars, well open, their sides 

 parallel. Posterior palatal foramina small. Mesopterj^goid fossa 

 parallel-sided, well open, as in Rattas and its allies, its breadth ante- 

 riorly nearly double that of the narrow pai-t of the base of the 

 pterygoids bounding it on each side. Bullte not preserved in the 

 only specimen available. 



Upper incisors light and slender, more thrown forward than 

 usual, their angle to the tooth row about 88° j their outer edge 



