hk;kory. tetjnk — tiger cerameyy. the larva. 149 



Except in those cases where its burrow is taken possession of 

 by ants, the exterior opening which is made 

 _._ „ Iby this beetle when it crawls out from the 



1 ^L^^ i i ^^^^' ^°°" closes up, leaving a round, ragged 

 t ^^^* ' l| ^'^^^ ^poT3. the smooth back of the bitter wal- 

 ** nut and the limbs of the shag-bark walnutj 



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 unfit 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 larvse of the important genus of wood-boring beetles to 

 whicTi this species pertains. I therefore give a more full and 

 particular description of it. 



The Larva, when full grown is somewhat over an incU in length and a quarter of 

 an inch in diameter across the second or broadest segment. It is a soft, smooth and^ 

 slightlji 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 eiUpticil pale yellow spots with a dark chesniit 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 and 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 obliqu ely downwards ^nd 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 transverse 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 pal? tawny 

 color with numerous minute punctures; its basal part has coarser punctures and 

 short impressed longitudinal lines which are more or less confluent with each other. 



