FOREST TREE INSECTS. 



345 



Fig. 10. 

 Chestnut Maggot. 



INSECTS INJURIOUS TO FOREST TREES. 



The Chestnut Weevil.— The chestnut is often infested by a 

 large white maggot (Fig. 10, larva 

 of Balaninus and chestnut infested), 

 with a yellowish head, which attains 

 its full size at the time the nuts drop. 

 It is found in nuts sent to market,! 

 and it is probable that while some of 

 the maggots gnaw their way out, and 

 enter the ground in the autumn to 

 transform, others delay until the spring. Its habits, however, 

 are not known, nor even whether it be the same as 

 the weevil of acorns, which has been proved by Mr. 

 Riley to be the young of the Balaninus rectus of 

 Say. We introduce from Dr. Harris' " Treatise on 

 some of the Insects Injurious to Vegetation " a cut 

 of Balaninus nasicus (Fig. 11), which is either the. 

 parent or closely similar to the parent of the chest- 

 nut maggot. 



6& Fio. 11. 



Balaninus nasicus. 



The Chestnut Borer. — The chestnut tree itself is 

 remarkably free from borers, and no insect has hitherto been 

 known to bore into the trunk. My attention has, however, 

 been called by Mr. R. B. Grover, 

 a student in the State Agr. Col- 

 lege, to the fact that the Arrhop- 

 alus fulminans Fabr. (Fig. 12, 

 enlarged twice) , one of the fam- 

 ily of Longicorn beetles, bores 

 in the trunk. I know nothing 

 farther concerning its habits, 

 nor of the appearance of its 

 grub. The beetle itself is black- 

 ish brown, with slight dark-blue 

 reflections ; the legs and antennae fio. 12 —chestnut Borer. 



are of the same color, the latter being scarcely larger than its 

 body. The top of the head, and the sides of the prothorax, 

 and under side of the body, are covered with a pale-gray pile, 



