BANGS: CHIRIQUI MAMMALIA. oo 
Measurements — 
No. Sex. Total length. Tail vert. Hind foot. Ear. 
10,340 d old ad. 360 195 35 22 
10,326 9 ad. 345 185 36 23 
10,324 type 9 yg. ad. 335 180 33 22 
10,325 ? yg. ad. 333 165 33 ao, 
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. 
Remarks. — 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, O. childi of the 
Bogota region of Colombia and O. maculiventer 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 ALLEN. 
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 — 
No. Sex. Total length. Tail vert. Hind foot. Ear. 
10,294 ? old ad. 200 105 21 11 
10,293 & old ad. 190 106 20 Fe 
10,296 & ad. 190 105 22 14 
10,307 ? ad. 190 105 21 12 
10,299 & yg. ad. 180 100 21 12 
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 O. costaricensis; hind foot larger; ear larger; 
color above darker, redder, below buffy instead of white; skull larger and 
1 Vegetus, active, sprightly. 
