INSECTS AFFECTIXG I'ARK AXU WOOULAXD TREES 



357 



bers at Slinoerlaiitls ami Karntr. It was found workinj^r in a reccntlv cut 

 hard pine at Kanicr and in white pine Hmbs which had just been cut at 

 Slinorcrlands. This beetle was common at Manor L. I., in 1900. It was 

 taken from under the bark of the middle portion of the trunk of a pitch 

 pine, which was attacked at the base by D e n d r o c t o n u s terebrans 

 Oliv. It appeared to be the jjrimary offender in one case where it was 

 borini,"- in larq-e numbers in a limb on which the needles were still nreen, 

 though they dropped readily. It was found working in the living tissues at 

 the base of another dying hard pine. This lattter tree had thrown out 

 sprouts in a last effort to sustain life and even these were dying. Another 

 small tree was found badly infested with this bark borer. The leaves were 

 just beginning to turn yellow and the attack was confined almost entirely to 

 the upper portion of the trunk. 



Description. This is one of the medium sized species of Tomicus. 

 The beetle is a tritle over 'g inch long, cylindric, rather slender in form and 

 like other species of this genus, varies in color from a 

 light to a dark brown. The posterior excavation or 

 declivity of the wing covers is bordered by a series of 

 five teeth. The one near the dorsal median line is 

 very minute, the second and third are much larger and 

 connected at the base and the fourth and fifth are f';; r p i.r; 1 ., 



c a c o a r ;. p h 11 s (autlior's 



smaller and distinct from each other. The prothorax illustration) 

 is rather coarsely granulated and the wing covers are marked with longitu- 

 dinal rows of rather deep punctures. The antennal structure is illustrated 

 on plate 66, figure 8 and the tibia in figure 71c. 



The soft white pupae may be found in their oval cells in the l)ark. 

 The pupa is usually creamy white, about as long as the beetle and with a 

 tapering abdomen with one or two segments usually extending bevond the 

 tips of the wing covers. 



The full grown larvae or grubs are a creamy white, about 3 ,f, inch long 

 and with the body slightly curved. The head is light brown with the tips 

 of the mouth parts and adjacent sutures much darker. 



