INJURIOUS AND BENEFICIAL INSECTS OF CALIFORNIA. 



237 



enter at a bud or in a fork, in which eases gum often exudes to form a 

 large drop. In not a few r;ises the burrows completely occupy almost 

 the entire twig, which may be nearly severed from the tree. 



Fig-. 225. — The western twig-borer. Apate pnncti- 

 pennis (Lee.). Adults, enlarged twice. (Author's 

 illustration, Mo. Bui. Cal. Hort. Com. i 



Fig. 226. — Work of the western twig-borer, Apate punctipennis 

 i Ler.), on apricot twigs. Natural size. (Author's illustration. Mo. 

 Bui. Cal. Hort. Com.) 



