INSECTS AFFECTING PARK AND WOODLAND TREES 399 



The attacked shoot continues its growth during the early part of the season, 

 but soon the grubs cause so much injury that it begins to wilt and wither 

 about the middle of July, and the tender parts above dry and perish. 

 Examination of the affected shoot reveals small oval cells, about y£ inch 

 long, placed lengthwise in the center of the stem. They are so very close in 

 some cases that their ends are nearly in contact, and in others they are 

 more or less widely separated by masses of borings, and not infrequently 

 small cells may be found in the sapwood just beneath the bark [pi. 19, 

 fig. 6]. 



Each of these contains a white plump larva or grub, which later changes 

 to a pupa and the adult insects appear abroad next spring. Pupal cells 

 of this weevil may also be found under the bark of pine logs and stumps. 

 Mr L. H. Joutel has recently called the writer's attention to the breeding 

 of this insect in the bark of a tree 6 inches in diameter, a fact pre- 

 viously mentioned. Dr Fitch was quite confident that eggs deposited 

 in the spring become mature beetles within a year. This weevil was 

 observed by the writer to be very common and injurious to white pines at 

 Karner in 1901, and the following year he had an opportunity of studying 

 recent work of the pest in small white pines at Salem N. Y. These obser- 

 vations indicate that the attack frequently begins just below the terminal 

 whorl and is evidenced by the small irregular masses of pitch and the lighter 

 color of the foliage above the point of injury. The larva or grub makes a 

 longitudinal burrow in the inner bark, which is closely followed by a drying 

 and shrinking of the tissues immediately above and adjacent to the wound, 

 forming a darker, sunken area on the shoot. The work is extended down- 

 ward under the bark to the next whorl and possibly below. The infested 

 bark soon becomes a mass of burrows and decaying matter, eventually 

 peeling off and revealing oval pupal cells in the wood. Its work was also 

 observed here and there in other parts of the State. The record of captures 

 by beating certain trees in 1901 may be of interest, as it shows the persist- 

 ence of this species in small numbers, at least, throughout a long period. 

 The record is as follows: June 4, 6; June 13, 18; June 19, 1 ; June 26, 2; 



