Twelfth Eeport op the State Entomologist 241 



the bark." The egg is deposited on the trunk at various heights from 

 the ground upward to at least ten feet in low branching trees, and even 

 higher when the infestation has been of long continuance. The newly 

 hatched larva, about one-fifth of an inch in length, may be found within 

 its burrow at a depth perhaps of one-tenth of an inch, by cutting in at 

 the places indicated as above. September 12th, Dr. Packard found that 

 the mines or burrows of the young larvae were already about an inch 

 long, most of them being directed upward. They pass the winter in 

 shallow burrows in the bark. The following spring they burrow deeper 

 and mine the cambium layer and the living wood, — the burrows steadily 

 increasing in size with the growth of the larvae. It is probable that the 

 insect requires two years to complete its transformations, and that 

 an entire season is spent by the long white fleshy grubs, with deeply 

 marked transverse incisions, in running their mines or burrows, about 

 one-third of an inch in depth and one-half an inch in width, in all direc- 

 tions beneath the bark. On the approach of the second winter the larvae 

 probably burrow to the depth of an inch or two in the trunk and there 

 hibernate. In the spring feeding is resumed and the burrows continued 

 a distance neatly equal to that ©f the previous season, before the pupal 

 chamber is excavated in the wood. Mr. Kirkland found a number of 

 burrows in an infested tree with a chamber midway of their length, and 

 thought that this might indicate the place of hibernation. The larval 

 burrows usually run upward and partially around the trees, but occa- 

 sionally downward. They frequently intersect, and thus a badly infested 

 tree may be effectually girdled and killed. 



Distribution. 

 The recorded distribution of this beetle is curiously limited. The ex- 

 planation may be that only within this area has it been sufficiently 

 abundant to attract attention, although it would seem that even if rare,, 

 some examples should fall into the hands of collectors and the localities 

 be made known. The reported distribution is as follows ; South Quebec, 

 the southeastern portion of Ontario, Maine, New Hampshire, Vermont, 

 Massachusetts, Rhode Island, Connecticut, New York, New Jersey, 

 Pennsylvania, Michigan, Indiana, Northern Illinois and Wisconsin. 

 This record indicates comparatively narrow bounds, but it will probably 

 be found that it extends over a much greater area than indicated above.. 

 There is apparently no reason why it should not extend to the Rocky 

 Mountains, if not to the Pacific coast. 



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