GOAT MOTH. 



131 



caterpillar may be known by its great size* (for it is 

 three inches or more in length), joined to its yellowish 

 colour, with reddish patches or stripes down the back 

 and black head, and the strong and peculiar smell 

 from which it takes its name. It bores into the live 

 wood, and lives there for three or more years before 

 turning (in a cocoon roughly spun up of small bits of 



Fig. 104. — Goat Moth and chrysalis. 



wood just inside the entrance of the burrow) to the 

 chrysalis stage. 



The means by which the grub can be attacked in 

 its burrow are applicable to many timber-burrowers. 

 Something may be done by thrusting a stout wire up 

 the boring ; if the end comes back moist with white 

 matter on it, the caterpillar has been reached ; or, by 

 means of a hooked wire, the caterpillar, when feeding 

 near the outside of the tree, may be drawn out. 

 Another very good plan, when the caterpillar is 



* See figure of caterpillar, about half-grown, p. 123. 



