BOSTON ZOOLOGICAL SOCIETY. 15 



ZAFOBIBM {Jumping Mice.) 



7. Jaculus hudsonius Cones. Jumping Mouse. 

 This species, though far from rare, is by no means numer- 

 ous in this state. It makes its nest, in which to rear its 

 young, under logs and in Hke situations; the burrow not 

 exceeding six inches in depth. In winter, however, it 

 probably makes a much deeper one. 



MURIBM (Mice.) 



8. Mus RATTUS Linn. Black Eat. A locally abun- 

 dant species, which, though generally rare near the sea- 

 board, is more common inland. It is an imported species, 

 and was introduced into this country from the Old World 

 before the I^orway Rat (Mus decumanus,) which is its 

 mortal enemy. 



9. Mus DECUMANUS Pallas. Norway Rat. A very 

 common and well known species. More abundant in the 

 Eastern than in the Western portion of the state. In 

 many of the cities on the sea-coast it is supplanting the 

 Black Rat {Mas rattus.) It is our largest and most inju- 

 rious species of Mus, and not only commits havoc in our 

 larders and granaries, but also does a great deal of dam- 

 age in poultry yards, carrying off numbers of young 

 chickens and sucking their blood. 



10. Mus MuscuLus Linn. Common House Mouse. This 

 species is so well known that many remarks on either its 

 habits or distribution would be superfluous. It will be 

 sufficient to state, that like the two preceding, it is an im- 

 ported species and has introduced itself into almost every 

 town and village. 



11. Hesperomys LEUcopus Le C. White-footed Mouse. 

 An abundant species. Found throughout the fields and 

 woods. On the approach of winter it retires into holes 

 in stumps, and there having constructed its nest, hiber- 

 nates in a half torpid state. 



12. EvoTOiMYS GAPPERi Vigors. Red-backed Mouse. 



