GNAWING ANIMALS RODKNTS 121 



it increases witli extraordinary rapidity, one female 

 producing four or five litters in a season. Curiously 

 enough the ravages of wood mice on hyacinth bulbs 



Fig. 36. — Wood Mouse and family. (Photo, by H. C. Wood.) 



have taught the Dutch growers a method of increas- 

 ing their stock. Certain bulbs producing no flowers 

 were examined, and found to have been gnawed to 

 the heart by mice, and in consequence of the injury 



