70 NORTH AMElUCAN FAUNA 0, FISH AND WILDLIFE SERVICE 



fi'ontals shorter, h'l^ader and more obtusely pointed; dentition similar 

 ■but usually heavi6i\ 



M-easv^euh^e^^.-^'kh adult male from Jalapa, Nicaragua: Total length, 950 mm.; 

 tail vertebrae, 310; hind foot, 120. An adult male from San Rafael del Norte, 

 Nicaragua: 880; 250; 110. Sk'ull: Type: Greatest length, 125.5; condylobasal 

 length, 122.9; zygomatic breadth, 75.8; interorbital breadth, 25.8; width of 

 palate between last molars, 24.1; least width of palatal shelf, 17.3; maxillary 

 tooth row (alveoli), 47.3; upper carnassial, crown length, 10, crown width, 10.7. 



Remarks. — P. I. crassidens is similar to P. I. immilus and P. I. 

 dickeyi in external appearance, all sharing an extremely dark colora- 

 tion. While closely allied to the forms mentioned, the cranial char- 

 acters presented are quite distinctive. Some specimens from the 

 interior and southeastern coast region of Salvador, quite near the 

 restricted range of dickeyi, are distinctly grayer than typical crassidens, 

 and in this character, as in cranial details, grade toward shurfeldti. 



Specimens examined. — Total ntnnher, 18, as follows: 

 Costa Rica: El Sauce Peralta, 1 ; Talamanca, 1 (type); exact locality unknown, 1. 

 Nicaragua: Jalapa, 2;^'' San Rafael del Norte, 2;^" Vijagua, I.''" 

 Salvador: Barrios Mine, Morazan, l;"" Colima, Cuscatlan, 1;^' Lake Guija, 1;^^ 

 Puerto del Triunfo, Usulutan, 1;*' Rio Goascoran, La Union, 1;^' Rio San 

 Miguel, 3;*i San Pedro Mine, Morazan, l;^i Volcan San Miguel, 1.*^ 



PROCYON LOTOR PUMILUS Miller 

 Isthmian Raccoon 

 Procyon pumilus Miller, Biol. Soc. Washington Proc. 24: 3, Jan. 28, 1911, 



Type locality. — Ancon, Panama. 



Type. — No. 171983, young a(hilt [female?], skin and skull, United 

 States National Museum; collected by Allan H. Jennings, 1910. 



Distribution. — Panama and the Canal Zone from Porto Bello west 

 to Boqueron, Chiriqui, limits of range iniknown. Tropical Zone. 



General characters. — Closely allied to P. I. crassidens of Costa Rica; 

 color very similar; skidl shorter, relatively broader and flatter. 



Color. — Very dark, the upper parts heavily overlaid with ])lack 

 about as in P. I. crassidens, but white supraorbital lines usually less 

 distinct, somewhat obscured by dusky hairs. 



Cranial characters. — Sktdl smaller, siiorter, relatively broader, and 

 still flatter than that of P. I. crassidens; interorbital and postorbital 

 regions broader; postorbital processes longer, narrower, more acutely 

 pointed; dentition lighter, especially the cheek teeth distinctly smaller. 



Measurements. — Adult male from Porto Bello, Panama: Total length, 920 mm.; 

 tail vertebrae, 350; hind foot, 125. Adult female from Gatun, Canal Zone: 

 831; 292; 123. Skull: Adult male from Porto Bello, Panama and adult female 

 from Gatun, Canal Zone, respectively: Greatest length, 113.5, 113.2; condylo- 



*" Amer. Mus. Nat. Hist. 



<' Donald R. Dickey collection. 



