486 SEVENTH REPORT OF THE FOREST, FISH AND GAME COMMISSION. 



The soft white pup.ne may be found in tlieir o\-al cells in the bark. They are 

 normally 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 larva or grub is creamy white, about ^ ,t, of an inch long anti 

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

 mouth parts and adjacent sutures much darker. 



Life History. Adults of this species were entering the limbs of a hard pine in 

 large numbers at Manor, L. I., October 3, 1900. The galleries being made at that 

 time were evidently both for hibernation and food. They were a little over '/,;; of 

 an inch in diameter, e.xceedingly tortuous and apparently with no definite plan. 

 In one portion the beetles had just begun their operations and the curious manner 

 in which they work in living bark is shown on plate 7, figure i. A more ad\-anced 

 stage is illustrated at plate 7, figure 2, and shows how completely a limb ma\- be 

 girdled within a short time. The specimen from which this illustration was made 

 was taken from a limb about 10 feet long which bore many green needles. The 

 foliage dropped readily, but, as the tree had apparently been vigorous till within a 

 short time, the injury was attributed to this insect. A central or entrance chamber 

 will be seen in both of these illustrations, though most of the galleries are very 

 irregular and apparentl}' follow no plan. The tendency of the adults to work 

 largely with the grain of the bark is shown in plate 7, figure 3, which illustrates a 

 very badly bored piece of hard pine bark. There was very little or no exterior 

 evidence of the operations of the larva in this instance. 



Natural Enemies. Several insects prey upon this bark borer, one of the most 

 important being Thanasiimcs dubius Fabr., which attacks this species as stated by 

 Dr. Hopkins. The writer has also met with Mister leeontei Mars, and Plegaderiis 

 trausversus Say in the galleries of this insect, where it was associated with the larger 

 Toiniciis calligraphus Germ. Dr. Hopkins records meeting with Hister parallelus 

 Say in the burrows of this species. 



Dr. A. D. Hopkins has reared several parasites from this species. Spatliius ean- 

 adensis (?) Ashm. was bred by him from cocoons found in the mines of this insect 

 in white pine; and .'^. pallidus Ashm. was reared by him from cocoons found in 

 the larval galleries under the bark of scrub pine. 



