INSKCTS AFFECTING PARK AND WOODLAND TREES 



53 



Description. The parent insect is a beautiful stout beetle about one 

 inch Ion;;-. It is black, brilliantly marked with yellow, as represented at 

 figure 4 of plate 2. The borer or larva is a whitish, flattened, footless grub 

 with brownish mouth parts. Small ones [pi. 2, fig. 2], about l4 inch long, 

 are found in September just under the bark and come from eggs laid the 

 same season. The nearl)- full grown borer [pi. 2, fig. 3J is aljout 2 inches 



mmmm 



Fig. 2 Injury produced by 

 verse burrow in a 

 about 18 inches 



Fi_5, 3 Large dead 

 about 15 inches i 



long, white, with some rosy tints and in other respects closely resembles the 

 smaller ones. 



Life history and habits. The parent insects or beetles occur from the 

 latter part of June till into August. Most of the eggs are probably laid dur- 

 ing the latter two months. The place of oviposition [pi. 2, fig. i, ia\ may be 

 recognized by the irregular discoloration of the bark, caused in part by the 

 sap flowing from the wound and partly from the expelled frass or excrement, 

 the latter often hanging in small masses from the point of entrance. We 



