nOO NEW CENTRAL AMERICAN MOUtSK THUE. 



below than above. ■ .Wbif^kcis bhu-k. Eye sunouuded by a (Uuk-browii 



ring. 



Dimcnuiona of the hodi/.* 



I. 1 '^' Mexico. 



III})!. mill. 



Length of head and bodv 108.0 104.0 



I.cu^'th of tailv.-rUlinc 85. 



I.cii-th of terminal |)oncil of tail 10.0 



Length of hind fool and claw "-';!. 22. 



Height of ear from lower margin of orifice 14.0 13. 5 



(I Anieiiean Nriiseiim of Xatnral History. 



The skull has stioni;- supraorbital ridges, but ])reseiits no well-deliiied 

 difVereuees from that of s. sKmiclirasti. 



This species is easily distiiii>uished from iS. sumichyasti, of which 

 there are two specimens in tlie National collection — one, as already 

 stated, a young indivicbial, and the other an adult from INIirador, Mex- 

 ico, collected by Dr. Sartorius. The latter was compared with the 

 type- specimen of *S'. .sictnichraMi from the Geneva Museum, iu 1890, by 

 Dr. J. A. Allen, Dr. Merriam, ami myself, and found to be identical. 



From S. siniiichrttsti, the species herein described differs by its much 

 paler and yellower coloration, its dusky cars and tail, and also bj' the 

 eomparative shortness of the tail. 



T am unable to tind any described species to which it can be eousid- 

 ered as belonging. From the fact that one specimen comes from Mexico 

 and the other from Honduras it would appear that it has a wide dis- 

 tribution in Central America. 



I wt)uld remark in this eonnection that it seems probable to me that 

 ^. salvini (Tomes) is distinct from ^. sumieht-asti, although the two are 

 united by Alston and Trouessart. Specimens of S. s<tlri)ii from Guate- 

 mala and Uonduras in the National collection agree with each other 

 and differ from *S'. .sunniclna.sfi, from Mexico, iu having a chocolate- 

 brown tail and large, thin ears, clothed with hairs of the same color. 

 The tarsus is also more or less dusky, and the ferruginous of the back is 

 shaded with black by the intermingling of hairs of that color. 



In S. .sum tell rasti the upper surfaces, together with the tail, ears, and 

 tarsi, are nearly unifoiiu dull ferruginous throughout. 



*From the dry skiu. 



