LIST OF RECENT MAMMALS INDIGENOUS TO 

 PENNSYLVANIA AND NEW JERSEY. 



Class MAMMALIA. 



Order Marsupalia ; Marsupials. 

 Family Didelphid^e ; Opossums. 

 Genus Didelphis Linnaeus. Systema Naturae, 1758, Vol. I., p. 54. 

 Northeastern or Virginia Opossum. Didelphis virginiana Kerr. 



1792. Didelphis virginianus Kerr, Animal Kingdom, Vol. i, Systematic 

 catalog inserted between pages 32 and i^^ ; description on another page. 



Type locality. — Virginia (Colonial). 



Faunal distribution. — New York to Florida, west to Mississippi valley. 

 Formerly confined to austral zones ; now invading the transition zone. 



Distribution in Pa. and N.J. — Variably abundant in middle and southern 

 counties in all situations except in the mountain summits ; extending north- 

 ward in lessening numbers along river valleys to and into New York state from 

 Lake Erie to the Hudson River. With the deforesting of the mountains in- 

 vading large areas of the Alleghanian regions previously unknown to them. 

 Equally "at home" in the lumber piles and hen roosts of the town as among 

 the untrodden haunts of the wilderness. 



Records in Pa. (extralimital only given) : 



Armstrong and Butler Cos. — " I have examined specimens from the Buf- 

 falo Creek region of these two counties." — Todd, 1902. 



Cameron Co. — "Last winter (1895) two were brought to Emporium." 

 — Larrabee. 



Centre Co. — Rare, and at lower levels only. One killed at State College 

 in 1895. — Fernald. 



Clinton Co. — Specimen in Pierce's collection taken near Renovo. I saw 

 tracks of one, Nov., 1898, along the Sinnemahoning at Round Island. — 



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