26 College of Forestry.. 
of frass and allowing the hole to fil! completely with water, 
but resumed work immediately with most of body under 
water. When the entire body was covered he ceased all move- 
ment but still remained with his head and thorax in the bur- 
row.— In nature during a rainstorm he would be more likely 
to survive in the burrow than he would upon the surface of 
the bark as he would be less likely to be washed from the 
limb by raindrops. 
It would seem then that so long as the tip of the abdomen 
and elytra are not covered, water has no bad effect not even 
causing the insect to suspend work. When the entire body 
is covered, however, the air supply is shut off and all move- 
ment ceases till the opening between the end of the abdomen 
and the wing covers again has access to the air. 
Errect oF TurRPENTINE.— A specimen was next re- 
moved from the bark and placed in a watch glass in a drop 
of spirits of turpentine. It struggled violently lashing about 
with its legs and antennae and working its mouth parts. 
Within a few seconds its struggles became less violent, the 
head was withdrawn into prothorax nearly to the level of 
the base of the mandibles and the only sign of life was a 
spasmodic twitching of the legs. This specimen and others 
treated in a similar manner did not recover, showing that 
turpentine is quite deadly if the entire body is submerged. 
A drop of turpentine was then placed in a burrow which 
was so far advanced that the end of the abdomen of the oc- 
cupant was just visible (Fig. 10). He backed out till the 
end of abdomen protruded shghtly, kicking vigorously, with- 
drew shghtly with hind legs kicking and anus opening and 
closing. The specimen acted as if in great distress, plunging 
into and out of his burrow but never leaving it entirely. He 
would back out to level of the prothorax and immediately 
plunge in again till only the ends of the elytra were exposed. 
He was apparently not lacking in vigor as this performance 
was kept up almost rythmiecally for thirty-five minutes, this 
behavior being occasionally varied by his retreating to the 
bottom of the burrow or rotating at the entrance. At the 
end of forty minutes he became fairly easy in his actions 
