as Enemies of Mankind. 



57 



D. E. 



Fig. 5.— Cheek Teeth of Murinae. 



A. Long-Tailed Field Mouse {Apodemus sylvaticits)—a, slightly worn, 

 b, much worn ; B. Haevest Mouse {Micromys minutus) ; C. House 

 Mouse {Mus muscidus) ; D. Brown Rat (Rattus norvegicus) ; E. Black 

 Rat {R. rattus). Enlarged (figs. A. B. and C. x 10; D. and E. x 5). In 

 each case the left-hand figure represents the molars of the right upper 

 jaw, while the right-hand figure shows those of the left lower jaw. 



