New Yorx AGRICULTURAL EXPERIMENT Station. 407 
are steel-colored beetles, flattened above and with irregular depres- 
sions on the wing covers. 
Treatment.— The trees should be examined at least once a year 
and the borers dug out with a knife or killed by inserting a flexi- 
ble wire into the burrows. 
THE ROUND-HEADED APPLE-TREE BORER. 
(Saperda candida Fab.) 
Description.— The life-history of this species is similar to that 
of the preceding except that the grub requires but about a year to 
reach full growth. In both the grub and adult stages the body 
is more nearly cylindrical in outline. The adult is prominently 
marked by two broad, nearly parallel, white lines extending the 
full length of the body. 
Treatment.— The same as for the preceding species. 
LEA¥F-EATING INSECTS. 
THE APPLE-TREE TENT CATERPILLAR. 
(Clisiocampa americana Harr.) 
Description.—This tent caterpillar feeds upon a variety of fruit 
and other trees and is especially injurious to the apple. The eggs 
are laid in July in conspicuous brown rings or masses about the 
smaller twigs. The caterpillar is developed in the egg in the fall 
but does not emerge from the egg shell till early in the following 
spring. The caterpillars from each egg mass form a colony and 
spin a tent in which they stay when they are not feeding on the 
leaves of the tree. ( 
After they are full grown, that is about five or six weeks after 
hatching, they spin their cocoons. The adults, which are brown 
moths, with two, oblique, parallel white lines on the fore wings, 
emerge in the latter part of June or early in July. 
Treatment.— The egg masses may easily be gathered in winter 
and burned. The caterpillars may be destroyed while in their 
