127 
5 latter. , . j;fference in instiBct 
the object, though .ot the cause, °< *; "^^i.i.g ,, l„v. 
^eu the beetles emerging m autumn, and those lema g 
spring, is obvious ^^^_^ ^^^^^^^ ,„„,e 
Ihe bark, especially when riddled "J/"^ J ' ^ it feUs 
the action of the weather during the ^^^^I'^^^Zl..^^; but 
„.a. and numerous enemies ,u.cUy -^ f^^ j.rass mark- 
e buried in the wood are quite safe, f* '"'J ^^ ^ -^ „,eives 
.heir openings.whenthewoodh.los the h^^^^^^^^^^^^^ ^^^ ^^^^^ 
. the decomposing bark, being "''^J are very conspicuous, 
hes of white wood frass in the --^^/^^^^^Xh t S. Itr^e^or 
I do not remember having ^'^'^ ^ rMede\mtrn 
not attacked, frequently whiUtstilry-^^^^^^^^^^ ^^^^^ ^^^ 
I have never seen a '^^ ° VlttllTof the fi.^l* by pouring 
posed to resent and repel the attacks o y ^ ^^^^ ^^^^^_ 
sap into their burrows., - • " '^^Jf^^hich, containing a few 
burrows less than an inch long ^"■"<' »' ' ^ ^ the beetles, 
rk which had doubtless attracted the beetles. 
T..r I. TVii=i also lives m elm, 
,ii,g usually found in the =-; ° jj;, ai,„etcr. It is much 
,e„i.ring in smaller ones down to ^"^.^"^^1 ,,;, fo^od for fifty 
ore scarce than S. destructor, one "ft^J'^'^^j^^^/^t S. ^,,„.„c<or, 
f the latter insect. The burrows, «-«>;*;; ,,,e a longer 
tart from the bottom of a crevice m the bark, y 
