80 NEW-YORK FAUNA. 



Desc7'iption. Body robust. Ears rounded, as broad as long, and nearly naked. Eyes 

 black, large and prominent. Tail naked and scaly, with a short hair under each ring ; it is ' 

 sometimes as long as the body, but usually shorter. 



Color. Hair dusky ash at the roots, yellowish with a reddish tinge at the tips, intermixed 

 with longer hairs of a uniform brown, from which results a yellowish gray brown color above. 

 Beneath, soiled white, inclining to cinereous. Feet pale flesh-color. 



Length of head, 2" 5. 



Ditto of body, 9-0. 



Ditto of tail, 8-5. 



Tliis w^ell known and dreaded pest of our d^yellings came originally from Asia. It appeared 

 in Europe about the beginning of the seventeenth century. It is believed to have been 

 imported into England with its Hanoverian race of kings. In this country, it was introduced 

 with the foreign mercenaries during the revolutionary war. They are now numerous in all 

 the States, and have extended to Canada. It takes to the water, and swims with great ease. 

 In cities it infests the wharves, and hence is frequently known as the Dock Rat. The name 

 decumanus, we apprehend, was not given on accoiuit of its size {decimanus), but from decu- 

 manus, in allusion to the tithe of every thing taken by this voracious animal. (See Cicero 

 contra Verves.) 



The Rat is a bold, voracious and cunning animal, and appears to be as fond of flesh as of 

 vegetables. It brings forth twelve to sixteen at a litter. The best mode of destroying them 

 is said to be, mixing plaster of paris largely with dry flour ; this will harden in the stomach, 

 and destroy them in a short time. Another mode is to mix powdered nux vomica with indian 

 meal, and add a few drops of oil of rhodium to the mixture. Arsenic isfrequently employed, 

 but is objectionable on account of the fatal accidents to which it frequently gives rise. 



THE BLACK B.A.T.— {Introduced.) 



MUS RATTUS. 



Mus rattus. LiNN. 12 Ed. p. 83. 



Black Rat. Pennakt, Aict. Zoology, Vol. 1, p. 129. Harlan, Fauna Americana, p. 148. Godman, Am. Nat. Hist. 

 Vol. 2, p. 83. Richardson, F. B. A. Vol. I, p. 140. Emmons, Ma.'ss. Report, 1840, p. 63. 



Characteristics. Greyish black above ; ash-colored beneath. Tail somewhat longer than the 

 body. Length 15-16 inches. 



Description. Head long ; muzzle more acute than in the preceding species ; lower jaw very 

 short. Ears oval, broad and naked, nearly half as long as the head. Whiskers long. Fore 

 feet with four toes, and a claw in place of thumb. Tail longer than the body, and covered 

 with scales in the form of rings. Feet plantigrade. Slammffi twelve. 



Color. Deep iron-grey or greyish black above ; lighter beneath, usually cinereous. Feet 

 and tail dusky, with white hairs covering the tops of the feel. 



