BANGS : CHIKIQUI MAMMALIA. 



41 



Skull, type, old ad. 9, basal length, 20.2 ; occipitonasal length, 23 ; zygo- 

 matic width, 12 ; mastoid width, 10.8 ; interorbital width, 4.6 ; length of 

 nasals, 9 ; width of nasals, 2.8 ; length of palate, to palatal notch, 9.6 ; upper 

 molar series, 4 ; length of single half of mandible, 12.8. 



Pk.emarks. — Through the kindness of Dr. Merriam I was able to compare 

 the series taken by Mr. Brown with a fine adult $, No. 76,353, of true A. 

 teguina taken by Mr. E. W. Nelson at Ocuilapa, Chiapas, Mexico. This com- 

 parison showed that the Chiriqui animal is quite distinct — though it is per- 

 haps better to regard it as a subspecies- 

 Mr. Brown caught all five of these curious dark brown little creatures, in 

 open rocky places. 



Akodon xerampelinus,^ sp. nov. 



Type. — Mus. Comp. Zool., No. 10,240, old ad. $, Volcan de Chiriqui, May 26, 



1901. 10,300 feet. 



Three specimens, Volcan de Chiriqui, 10,300 feet. May and June. 

 Characters. — Apparently specifically distinct from A . teguina. Size of that 



22. X If. 23. X If. 



Figs. 22 and 23. Akodon xerampelinus. Type. 



species ; tail, longer ; pelage very long and fluffy with but little lustre ; colors, 

 paler — more yellowish, less reddish brown ; under parts grayish (strong cin- 



1 Teeth much worn. 



2 Xerampelinus, of the color of dry vine leaves. 



