New York AGRICULTURAL EXPERIMENT STATION. 365 
INTRODUCTION. 
The two species of insects discussed in this bulletin are among 
the most common of the apple orchard. Both are found every 
year throughout the State in varying abundance. They have simi- 
lar habits in their methods of feeding in that both consume the 
leaves and will quickly defoliate a tree if left undisturbed. They 
pass through similar transformations and the adults of both are 
moths. Of the orchard fruits both insects are usually most de- 
structive to the apple, although other fruit trees are not exempt 
from their attack. 
The apple tree tent caterpillar, although an insect very easy to 
control, was probably never more abundant throughout the State 
than during the past season. The unsightly nests of the cater- 
pillars were much too conspicuous along the roadsides of other- 
wise well-kept farms, while comparatively few uninfested apple 
orchards could be found. ‘The spring canker worm also, although 
probably not so evenly distributed over the State, has been very 
abundant in certain localities. From this is seems evident that 
these insects should receive more careful consideration than here- 
tofore in order to prevent their still further increase in numbers 
and the consequent injury to the orchards. Every farmer should 
be on the watch for them and take prompt measures for getting 
rid of them when they appear on the trees, whether by the road- 
side, in the dooryard or in the orchard. | 
& 
THE APPLE TREE TENT CATERPILLAR. 
Clisiocampa americana Harr. 
Order LrprpopTERA; Family LastocamMpip™. 
CLASSIFICATION AND NAME. 
Classification.— As indicated in the heading of this section the 
apple tree tent caterpillar belongs to the order Leprpoprrra. This 
order includes the moths and butterflies, among which, especially 
