APPLE INSECTS — BORERS AND MISCELLANEOUS 193 



attraction through the burrow, finally coming in contact with 

 and killing the grub. The small amount of kerosene necessary 

 to accomphsh this is said not to injure the tree. Do not waste 

 time and materials in trying to reach the borer through the 

 large round holes, as large as a lead pencil, for these are the 

 exit or emerging holes of the adult insect or beetle. The grub 

 or borer has finished its nefarious work and transformed into 

 the handsome beetle, which made the hole, and flew away to 

 seek its mate and provide for more destructive work by their 

 progeny. 



Reference 



U. S. Bur. Ent. Circ. 32 (third revise). 1907. 



The Spotted Apple-tree Borer 



Saperda cretata Newman 



This Cerambycid beetle is very similar to its near relative, 

 the round-headed apple-borer, 

 both in appearance and habits. 

 The beetle of the spotted borer 

 is about the same size and form, 

 but differs in being of a darker 

 brown color with its legs, antennae, 

 head and the middle portion of the 

 ventral surface of the same brown 

 color. Two broad, silvery white 

 stripes extend along the sides of 

 the thorax and abdomen and there 

 are two similar narrow stripes on 

 the dorsum of the thorax. The 

 continuous white stripes on the 

 wing-covers of the beetle of the 

 round-headed borer are replaced 

 by two large white spots on the 

 o 



Fig. 185. 



-The spotted apple-tree 

 borer (x2^). 



