INSECTS OF THE GARDEN 191 



again in May, and, finally, late in June. This latter is to 

 make sure that none of the larvae escape and thus prevent 

 any adults from emerging to lay their hundreds of eggs. 

 Excepting a few parasitic insects, no natural enemies of 

 this pest are mentioned by Professor Slingerland, but quite 

 possibly some child may be able to discover a flycatcher or 

 redstart or some other bird catching the moths as they flit 

 among the trees, laying their eggs. It is needless to add 

 that such an observation would be of great value. 



A number of other borers belong to the same family 

 and resemble the peach-tree borer in appearance and life 

 story. 



The Pear-Tree Borer, j^geria pyri. — This is often quite 

 destructive to pear trees. Its presence is revealed by chips, 

 resembling fine sawdust on the bark of the tree. It should 

 be dug out with knife and wire wherever found. 



The Grapevine Root Borer, yEgeria polistiformis. — In the 

 larval stage this insect bores into the roots of grapes. 

 The adult, a large, brownish-black, wasplike moth, meas- 

 uring from an inch to an inch and a half across the wings, 

 appears in August. 



The Imported Currant Borer, ^geria tipuliformis. — This 

 is widely distributed and renders the culture of this valu- 

 able fruit difficult or, if neglected, impossible. All hollow 

 canes should be cut out and burned in the fall or early 

 spring. 



Other destructive borers are the larvae, or grubs, of 

 beetles. Several of these which should be more com- 

 monly known are the following. 



The Roundheaded Apple-Tree Borer, Saperda Candida. — This 

 beetle is a very serious enemy of apple and quince trees. 



