BANGS: CHIRIQUI MAMMALIA. 35 



Skull. — Type, 9 , young adult, basal length, 31.6 ; occipitonasal length, 36 ; 

 zygomatic width, 18 ; mastoid width, 13.8 ; interorbital width, 5.6; length 

 of nasals, 14.2 ; width of nasals, 3.8 ; length of palatal slits 5.6; width of 

 palatal slits, 2.6; length of palate, to palatal notch 15.6; upper molar series, 

 5.4 : length of single half of mandible, 20. 



Remai-fcs. — Oryzomys meridensis Thomas, originally described from Merida, 

 Venezuela, has a very extended distribution in South America, and several 

 names have been bestowed upon it in different parts of its range. Dr. Thomas 

 does not look with much favor upon these supposed races, and is inclined to 

 unite them all. Those that I have seen specimens of are, 0. childi of the 

 Bosota region of Colombia and O. maculiv enter Allen, of the Santa Marta 

 district of Colombia. I cannot see that these two differ in any way. The 

 Chiriqui form is also similar to these externally, except for the somewhat 

 differently colored under parts; it has, however, good cranial characters to 

 distinguish it. 



Oryzomys (Oligoryzomys) costaricensis Allex. 



Five specimens, Boquete, 3,800 to 4,800 feet, April and March, Bogaba, 

 July. 



The type locality of this species is El General, Costa Rica, 2,150 feet altitude. 

 To it I refer five out of the eighteen specimens of Pigmy Oryzomys that 'Mr. 

 Brown took in Chiriqui ; the other thirteen represent quite a different form. 



Measurements — 



Oryzomys (Oligoryzomys) vegetus,^ sp. nov. 



Type. — Mus. Comp. Zool., No. 10,298, old ad. 9 , Boquete, April 16, 1901. 4,000 

 feet. 



Thirteen specimens, Boquete, 4,000-4,800 feet, February and April. 



Characters. — Larger than 0. costaricensis; hind foot larger; ear larger; 

 color above darker, redder, below buffy instead of white ; skull larger and 



1 Vegetus, active, sprightly. 



