8 farmers' bulletin 583. 



Before setting the trap it is well to ascertain the course of the burrow 

 by thrusting down a lead pencil, or stick of about that size. The 

 trap selected should then be lined up with the course as nearly as 



Fig. 3.— Types of mole traps: a, harpoon type; 6, scissor-jaw type; c, choker type. 



possible; the jaws of the scissor-jaw type should straddle it, the 

 loops of the choker type should encircle it, and the spikes of the har- 

 poon type should be directly above it. In the case of the harpoon 

 type it is best to force the impaling spikes into the ground once or 



