INSECTS AFFECTING PARK AND WOODLAND TREES 



357 



bers at Slingerlands and Karner. It was found working in a recently cut 

 hard pine at Karner and in white pine limbs which had just been cut at 

 Slingerlands. 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 Dendroctonus terebrans 

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

 boring in large numbers in a limb on which the needles were still green, 

 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 trifle over yk 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 Fi s- 73 Declivity of Tomicus 



cacographus (author'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 yic. 



The soft white pupae may be found in their oval cells in the bark. 

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

 tapering abdomen with one or two segments usually extending beyond the 

 tips of the wing covers. 



The full grown larvae or grubs are a creamy white, about 3 l6 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. 



