No. 145.] 
853 
Except in those cases where its burrow is taken possession of 
by ants, the exterior opening which is made 
by this beetle when it crawls out from the 
tree, soon closes up, leaving a round, ragged 
scar upon the smooth back of the bitter wal¬ 
nut and the limbs of the shag-bark walnut; 
which is visible for many years afterwards. 
Two of these scars are represented in the 
annexed cut. By the occurrence of these 
scars upon the bark we may be able to ascer¬ 
tain what trees have been infested by these 
and other borers, and will consequently have the wood perforated 
with holes and uufit for any valuable use.' 
Neither in Dr. Ratzeburg’s celebrated work upon forest insects 
nor any other author which I have at hand do I find any account 
of the larvae of the important germs of wood-boring beetles to 
which this species pertains. I therefore give a more full and 
particular description of it. 
The Larva when full growu is somewhat over an inch in length and a quarter of 
an inch in diameter across the second or broadest segment. It is a soft, smooth aDd 
slightly shining worm of a cream yellow color and a cylindrical form, slightly bulged 
and broader at the thorax, and is divided into thirteen segments by strongly 
impressed transverse lines, the sutures of the abdominal segments being more 
wide than those of the thorax. The nine breathing pores upon each side 
form elliptical pale yellow spots with a dark chesnut colored line in the 
centre of each ; the first pore is situated in the suture at the base of the 
second segment, the others are near the middle of the fifth and each of the 
following segments. A faint darker stripe extends along the middle of the 
back and is interrupted at the sutures, and upon the top of each segment 
except the three first and two last is a transverse oval space composed of somewhat 
irregular rows of small elevated points, one row forming a ring upon the outer mar¬ 
gin of the oval space anf one or two other rows running transversely across its disk. 
Beneath, upon these same, segments is a similar oval space, but the elevated points are 
here rather more confused and indistinct. The second segment is longest and the 
two next are shorter than any of the following ones. The second segment upon its 
upper side is flat and inclines obliquely downwards and forwards; it is clothed with fine 
brown hairs, and similar hairs are scattered along the sides of the body; across its 
middle is an impressed transveise line forming the arc of a large circle, the ends of 
which line are turned backwards and are continued to the basal margin by a small 
semicircular impressed line. The anterior part of this segment is of a- pale tawny 
color, "Ith numerous minute punctures; its basal part has coarsev punctures and 
short infuessed longitudinal lines which are more or less confluent with each other. 
