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gave me auy clear differeutiatiou of the parts of the very young larvfe. 

 1 found tliatAvliile there was no trace of distortion in the bud, and it 

 was impossible to distinguish with any degree of certainty the infested 

 from the sound bud, yet almost immediately after the young pears had 

 set, or almost immediately after the flower had become pollenized, a 

 change.in appearance took place. As soon as the blossoms had droi)ped 

 there was no difficulty whatever in recognizing the infested fruit, and 

 here another peculiarity was noticed. While almost all the infested 

 pears stuck fast and started growing, most of the apparently sound 

 pears dropped almost as soon as growth began; when growth of the 

 fruit had fairly started and it was larger than a pea, only infested 

 pears remained upon the tree. 



As if this was not sufficient, an entirely new pest on pears was 

 brought to my attention this spring. In the vicinity of Hilton and 

 Irvington, localities not far from Newark and lying between Newark 

 and Elizabeth, a borer has niade its appearance that threatens to kill 

 all the pear trees in that region within a very few years. The insect 

 has been known for several years, but not until this season was it 

 brought to my attention. There was no difficulty in finding the larva; 

 in trees of all ages, and there was no difficulty in recognizing it at 

 once as that of an Agrilus. The larvae when full grown measured 

 nearly an inch and a half m length, and a single larva in the course 

 of its life made a burrow which, when measured, ranged between 6 

 and 8 feet in length; not in a straight line of course, but in the wind- 

 ing and sinuous line which is peculiar to many Buprestid larvse. 

 From this enormous larva, making such a wonderfully long burrow, 

 I obtained two specimens of an Agrilus scarcely more than one- 

 fourth of an inch in length, and which Dr. Horn pronounced as 

 probably acutipennis. The determination was made from females 

 only, and may have to be changed to anxius, in which the females are 

 nearly alike, and the specific characters are marked in the males alone. 

 Before pupating the larva makes a short burrow into the solid wood, 

 preparing a chamber in which it undertakes its transformations. The 

 pupa state must be extremely short, because, although I visited the 

 infested orchards weekly, and found the larvte during tlie early part 

 of the season in the pupal chambers, yet I never found the pupa, and 

 always found either a larva just entered into the burrow, or a recently 

 vacated burrow, a little round hole being bored through the bark. I 

 never found a specimen of the beetle upon the trees, either on the 

 leaves or on the trunks; but about the middle of July I began to find 

 young larva\ The larva bores between bark and sap wood, its chan- 

 nels being distinctly visible in both. Where a number of them are at 

 work in the tree it becomes completely girdled sooner or later, and dies. 

 Every portion of the trunk is infested, and all the larger branches are 

 attacked. But it is not only large trees that the insect attacks; even 

 young trees just set out becomes its prey, and from a little sapling set 



