INSECTS AFFECTIXG PARK AND WOODLAND TREES 



53 



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

 inch long. 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 |pl. 2, fig. 2], about yi inch loner, 

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

 same season. The nearly full grown borer [pi. 2, fig. 3] is about 2 inches 





.1 •iiViK 



A Am 





1 h 



-> Injury produced b> i 

 verse burrow in a sugar 

 ab.nit i3 inches in di; 



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 mcMiths. The place of oviposition [ pi. 2, fig. i, \a\ ma}' 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 



