NO. 5 MAMMALS OF PANAMA — GOLDMAN 85 



Subgenus APORODON Howell 



REITHRODONTOMYS CREPER Bangs 



Chiriqui Harvest Mouse 



Reithrodontomys creper Bangs, Bull. Mus. Comp. Zool., Vol. 39, No. 2, p. 39, 

 April, 1902; text figs. 18-19. Type from Volcan de Chiriqui, Chiriqui, 

 Panama (altitude 11,000 feet). 



The Chiriqui harvest mouse is known only from the single example 

 collected by W. W. Brown, Jr., on the cold, barren summit of the 

 Volcan de Chiriqui. 



It is a dark brownish species, darker in general color than Reithro- 

 dontomys australis australis which inhabits the same mountain and 

 reaches nearly the same elevation. It differs widely from its 

 congener in cranial characters and belongs to another section of the 

 genus, one in which the outer wall of the antorbital foramen is 

 narrower and the dentition more complicated by small accessory 

 tubercles than in the more typical forms. This group with more 

 complicated dentition has recently been set apart by Howell (1914, 

 p. 63), as the subgenus Aporodon, to which all of the SCuth Ameri- 

 can species belong. 



Specimens examined: Volcan de Chiriqui, 1 (type). 1 



REITHRODONTOMYS MEXICANUS CHERRII (Allen) 



Cherrie's Harvest Mouse 



Hesperomys (Vesperimus) cherrii Allen, Bull. Amer. Mus. Nat. Hist., 

 Vol. 3, p. 211, April 17, 1891. Type from San Jose, Costa Rica. 



The range of Cherrie's harvest mouse closely parallels that of 

 Reithrodontomys australis australis from Costa Rica into western 

 Panama where, on the lower slopes of the Volcan de Chiriqui, the 

 two apparently occur at the same locality. R. m. cherriei is a larger 

 form than R. a. australis, with a tail measuring over ioo millimeters, 

 while in the latter animal the length of the member is usually less 

 than 90 millimeters. Moreover, they belong to different subgenera, 

 the present form being a member of the subgenus Aporodon. A very 

 young example from the grassy lake at Gatun is doubtfully as- 

 signed to this species. 



As Reithrodontomys costaricensis, a name synonymized by Howell 

 (1914, p. 73) with R. m. cherrii, Bangs (1902, p. 39) notes 30 speci- 

 mens obtained by W. W. Brown, Jr., at from 4,000-6,000 feet altitude 

 near Boquete. Brown found this harvest mouse one of the more 

 common small mammals of the forest belt of the Volcan de Chiriqui. 



1 Collection Mus. Comp. Zool. 



