Goldman — New Mammals from North and Middle America. 109 



character is shared with other mammals inhabiting the same generally 

 open savanna region, and is evidently associated with environmental 

 conditions. 



On the assumption that the rufescent pigmy opossums of Middle America 

 are referable to the Linnaean species " murina " this name was included 

 by True in his ' ' provisional List of the Mammals of North and Central 

 America and the West Indian Islands,"* the animal being credited by 

 him with a range from " Mexico to Brazil." The type region has since 

 been fixed by Thomas as Surinamf and specimens regarded by him as 

 cotypes are extant in the British Museum. Meanwhile numerous forms 

 of the genus Marmosa have been described by various authors, most of 

 which were treated as distinct species, but whose relationships are little 

 known. Species apparently assignable to the same section of the genus 

 inhabit Middle America, northern South America, and extend to some 

 of the southern islands of the West Indies. The continental Middle 

 American forms now known may confidently be referred to a single 

 species which may prove to be typified by murina of Surinam ; but until 

 the Linnaean animal and other South American forms already named are 

 better known it seems advisable to regard them as distinct. + These small 

 opossums are not to be confused with the still smaller light gray members 

 of the Marmosa canescens group which ranges in southern and western 

 Mexico. 



Specimens examined. — Total number, 5, all from southwestern Panama, 

 as follows: Boqueron (type locality), 2§; Bugaba, 3||. 



Pecari angulatus bangsi.TT subsp. nov. 



BANGS COLLARED PECCARY. 



Type from Boca de Cupe, eastern Panama (altitude 250 feet). No. 

 179,976, <? (posterior molars slightly worn), U. S. National Museum 

 (Biological Survey collection), collected by E. A. Goldman, June 19, 

 1912. Original number 21,790. 



General characters. — Similar to Pecari angulatus crusnigrum, but gen- 

 eral color decidedly paler, the black less predominant and lighter element 

 of pelage grayish or very pale buffy instead of tawny as in crusnigrum ; 

 shoulder stripe obsolescent (a broad tawny band present in crusnigrum). 

 General color similar to that of Pecari torvus, of Colombia, but shoulder 

 stripe much less distinct, and dentition indicating rather distant rela- 

 tionship. 



* Proc. U. S. Nat. Mus., VII (1884), 1885, p. 587. 



t Proc. Zool. Soc. London, Mar., 1911, p. 144. 



t On this basis Middle American forms may stand subspecifically as follows: 



Marmosa mexicana mexicana Merriam Juquila, Oaxaca, Mexico. 



Marmosa mexicana mayensis Osgood Izamal, Yucatan, Mexico. 



Marmosa mexicana zeledoni Goldman Navarro, Costa Rica. 



Marmosa mexicana isthmica Goldman Rio Indio, Canal Zone. 



Marmosa mexicana savannarum Goldman Boqueron, Panama. 



§ Collection Amer. Mus. Nat. Hist. 

 II Collection Mus. Comp. Zool. 



IT Named for Mr. Outram Bangs, in recognition of his extensive work on the mam- 

 mals of Panama. 



