DESCRIPTIONS OF NEW MAMMALS FROM PANAMA 

 AND MEXICO 1 



By E. A. GOLDMAN 



Further study of the collection of mammals taken by the writer 

 while detailed from the Biological Survey, U. S. Department of 

 Agriculture, to the Smithsonian Biological Survey of the Panama 

 Canal Zone has resulted in the discovery of eleven new species and 

 subspecies in addition to those already published. 2 In comparing 

 the specimens from Panama with other Middle American material 

 a new form of the genus Agouti and two new forms of the genus 

 Dasyprocta were found in the collection of the Biological Survey, 

 all from Mexico. The new species and subspecies from both regions 

 are described below. 



For the loan of types and topotypes for comparison, my thanks 

 are due to Dr. J. A. Allen, of the American Museum of Natural 

 History. 



BRADYPUS IGNAVUS, new species 



Type from Marraganti (about 2 miles above Real de Santa 

 Maria), near the head of tide-water on the Rio Tuyra, Eastern 

 Panama. No. 179551, female adult, U. S. National Museum (Bio- 

 logical Survey Collection), collected by E. A. Goldman, April 6, 

 19 1 2. Original number 21596. 



General characters. — Somewhat similar to B. griseus in color, but 

 upper parts more distinctly spotted with white; ruff grayish brown 

 across forehead (black in B. griseus) ; skull differing in detail, 

 especially the shorter, anteriorly concave or emarginate nasals. 



Color.— General color of upper parts brownish or grayish drab, 

 irregularly spotted, mottled, or marbled with nearly pure white, the 

 white predominating on the rump ; abdomen and inner sides of limbs 

 very pale drab gray; chin blackish ; throat and anterior part of chest 

 rusty brown; orbital areas and usual lines extending posteriorly 



1 The present paper is the eighteenth dealing with the results of the Smith- 

 sonian Biological Survey of the Panama Canal Zone. 



2 Smithsonian Misc. Coll., vol. 56, No. 36, pp. 1-11, Feb. 19- 1912; and 

 Smithsonian Misc. Coll., vol. 60, No. 2, pp. 1-18, Sept. 20, 1912. 



Smithsonian Miscellaneous Collections, Vol 60, No. 22 



