THE ANNALS 



AND 



MAGAZINE OF NATUEAL HISTOEY. 



[FIFTH SERIES.] 



No. 108. DECEMBER 1886. 



U XL. — Note on Hesperomys pyrrliorliinus, Pr. Max. 



' By Oldfield Thomas, Natural History Museum. 



When describing *, in 1882, the very interesting collection 

 of Rodents obtained by M. Stolzmann in North Peru for the 

 Warsaw Museum I identified, although with considerable 

 doubt, two specimens with Hesperomys pyrrJiorhinuSj Pr. 

 Max.f, originally obtained from Baliia, with whose very 

 insufficient description they agreed closely enough for it to be 

 unsafe to describe them as new without seeing Prince Maxi- 

 milian's typical specimens. 



That my doubts as to the correctness of this determination 

 were justified, however, has now been proved by the arrival 

 at the Museum of two young Vesper-mice agreeing so pre- 

 cisely with the description and figure of //. pyrrhorhinus that 

 I have no hesitation in referring them to that species. 



These specimens were obtained at San Leopoldo, Rio Grande 

 do Sul, by the indefatigable naturalist Dr. Hermann von 

 Ihering, to whom, both as collector and observer, we are 

 indebted for a considerable portion of our knowledge of the 

 mammals inhabiting that region. 



* P. Z. S. 1882, p. 98. 



t Abbild. Nat. Bras. pi. xxvii. 1822-26 ; Beitr. ii. p. 422 (1826). 



Ann. & Mag. N. Hist. Ser. 5. Vol. xviii. 29 



