33^ CONNECTICUT EXPERIMENT STATION REPORT, I907-I908. 



The Poplar Borer. While engaged in cutting and pruning 

 trees to control the gypsy moth in Stonington, the men came 

 across a poplar tree showing serious injury by borers. Chips 

 or castings were falling from large galleries in the wood of 

 the trunk. As the tree was of no value and was in such shape 

 as to be a hindrance, it was removed. A section of the trunk was 

 placed in a breeding cage and during August several specimens 

 of the poplar borer, Saperda calcarata Say, emerged from the 

 galleries and were killed and mounted for the collection. This 

 beetle is one of the long-homed beetles closely related to the 

 round-headed apple borer, and is of a mouse-grey color with 

 yellow stripes and spots on the thorax and wing covers, and with 

 fine black dots sprinkled over the wing covers. It is about an 

 inch in length. 



The Maple Barer. This insect, which is closely allied to the 

 preceding, is causing serious damage to maple shade trees in 

 Connecticut. A large proportion of the street trees in the 

 cities and villages, as well as the shade trees along the country 

 roads, show injury caused by this insect.. The maple borer. 



\rB^ 



Fig. 6. — The maple borer, natural size. 



Plagionotus speciosus Say, is a handsome black beetle with 

 yellow markings, and is about an inch long. It is shown in 

 Figure 6. The insect was studied many years ago, and the 

 evidence gathered showed that three years are necessary for the 

 species to develop from the egg to the adult stage, but the 

 subject should again be investigated. The beetles emerge here 

 usually about the first half of July, and probably soon lay their 



