114 Proceedings of the Biological Society of Washington. 



125. An adult male and female from Bugaba, respectively: Total length, 

 550-600; hind foot, 120-125. Skull: Greatest length, 105; condylobasal 

 length, 95; zygomatic breadth, 46.9; length of nasals, 39.3; interorbital 

 breadth, 29.4; palatal length, 52; maxillary toothrow, 19.2. 



Remarks. — The agouti inhabiting the savanna region near the Pacific 

 coast of southwestern Panama is a handsome subspecies readily distin- 

 guished from its geographic neighbors by the contrasting colors of the 

 upperparts. The black nape, tawny back and buffy rump present a color 

 combination unusual in the group. 



Specimens examined. — Total number, 5, all from Panama as follows: 

 Bugaba, 2; Divala (type locality), 3. 



Dasyprocta punctata richmondi, subsp. nov.* 



RICHMOND'S AGOUTI. 



Type from Escondido River, 50 miles above Bluefields, Nicaragua. 

 No. 51,333, 9 adult, U. S. National Museum (Biological Survey collec- 

 tion), collected by C. W. Richmond, November 16, 1892. Original 

 number 156. 



General characters. — A dark, richly colored form with concolor back 

 and rump, and pelage banded or ringed to base. Similar in general to 

 Dasyprocta punctata yucatanica and Dasyprocta punctata isthmica, but 

 darker than the former and more rufescent than either. 



Color. — Upperparts in general varying from rich tawny to near burnt 

 sienna (Ridgway, 1912), coarsely mixed with black, the tawny or rufes- 

 cent element predominating especially over back and rump; underparts 

 in general overlaid with varying shades from warm-buff to ochraceous- 

 buff, except along median line of abdomen, where the buffy color extends 

 to roots of hairs; feet black. 



Skull. — Similar in size to that of D. p. isthmica, but rostrum narrower; 

 sphenopalatine vacuities usually larger; audital bullse more inflated an- 

 teriorly. Closely resembling that of D. p. yucatanica, but audital bulte 

 usually smaller and less fully inflated. 



Measurements. — Type: Total length, 490; tail vertebrae, 35; hind foot, 

 123. Skull: Greatest length, 110.7; condylobasal length, 101.4; zygo- 

 matic breadth, 49.4; nasals, 44.4; interorbital breadth, 28.4; palatal 

 length, 57.4; maxillary toothrow, 17.9. 



Remarks. — Dasyprocta punctata was originally assigned to South 

 America, but according to Alston t the specimens forming the basis of 

 Gray's t short account were collected by Commanders Belcher and 

 Kellett " probably on the west coast of Costa Rica or Nicaragua." Since 

 Belcher's ship " Sulphur " made protracted visits to Realejo and vicinity 

 in 1837, 1838 and 1839, but touched very briefly at other points on the 

 Middle American coast the type region of D. punctata is most probably 

 western Nicaragua. In D. p. richmondi the hairs of the back are ringed 

 or banded to the base in accordance with Gray's description of the typi- 



* Named for the collector. Dr. Charles W.Richmond, now Assistant Curator of Birds, 

 U. S. National Museum. 



tBiologia Centrali- Americana (Mammalia), 1879-1882, p. 172. 

 J Ann. Mag. Nat. Hist., X, p. 264, Dec, 1842. 



