162 



INJURIOUS INSECTS OF 1904. 



of a circle outside of the jaw, resulting in a deformity, if it is the 

 upper teeth, something like the illustration shown in Fig. 153. 



Fig. 153. — Skull of Squirrel showing abnormal growth of upper incisor teeth. 

 Standard Natural History. 



Woodchucks: The accompanying excellent illustration shows 

 an animal familiar to us all, and generally not so abundant or in- 

 jurious but that the farmer's boy and a steel trap are quite equal 

 to the occasion. Bisulphide of carbon is also used successfully, 

 and at least one party known to the writer has had recourse to the 

 somewhat dangerous use of blasting powder. 



,^^M*^ 



Fig. 154. — Woodchuck, Arctomys monax. 



The gas generated by bisulphide of carbon is inflammable; keep 

 all lights, pipes, cigars or matches away from it. 



