124 INSECTS INJURIOUS TO FOREST AND SHADE TREES. 
The following Tineid occur according to Chambers on the poplars, 
aspens, &e.: 
27. Cemiostoma albella Chamb. 
28. Batrachedra salicipomonella Clems. 
29. Batrachedra preangusta Haworth. 
30. Batrachedra striolata Zeller. 
31. Aspidisca sp? makes a minute mine in aspen leaves in Oregon. Pos- 
sibly it is A. splendoriferella Clems. 
32. Gracilaria populiella Chamb. Larva roils aspen leaves in the Rocky 
Mountains. 
33. Gracilaria purpuriella Chamb. Larva mines leaves of silver-leaf 
poplar. 
o4. Lithocolletis populiella Chamb. Larva in a tentiform mine in under 
side of leaves of silver poplar. 
3). Appis populifolic Fitch. On under side of leaves of Populus gran- 
didentata (Thomas, viii, 102). 
36. Chaitophorus candicans Koch. Balin of Gilead. 
INSECTS INJURIOUS TO THE LINDEN TREE. 
AFFECTING THE TRUNK. 
1. THE LINDEN BORER. 
Saperda vestita Say. 
Order COLEOPTERA; family CERAMBYCID.E. 
Boring in the trunk, undermining the bark for six or eight inches in sinuous galleries, 
or penetrating the solid wood an equal distance, rather slender grubs, with three pairs 
of thoracic feet, transforming into a greenish snuff-yellow longicorn beetle, with six 
black spots near the middle of the back. 
The beetles, according to Dr. Paul Swift, as quoted by Dr. Harris, 
were foundin Philadelphia upon 
the small branches and leaves 
May 28, and it 
is said that they aa a 
come out as ear- 
ly as the first of 
the month, and 
continue to 
make their way 
through the 
bark of the 
trunk and large 
: Fic. 59.—The Linden borer, beetle of nat. size. a, upper. b. under, side of head 
branches dur- “ and three thoracic segments; c, side view of head of grub; d, top view of two 
ing the whole of enous showing the oval spots; e, the grub, slightly enlarged.—(From 
the summer. They immediately fly into the top of the tree, and there 
feed upon the epidermis of the tender twigs and the petioles of the 
leaves, often wholly denuding the latter, and causing the leaves to fall. 
