38 



Dendroctonus, Polygraphus, and Xyloterus; another showed iminerous Dendroc- 

 tonus galleries, and the third, a 12-inch tree with decayed roots, had numerous 

 Dendroctonus burrows reaching to the wood, but not completed. Near these trees 

 two others were observed that had each a decayed root, but were not attacked; 

 another 14-inch tree, attacked in 1899, had recovered and was not attacked this 

 year; another one, 20 inches in diameter, with the bark dead on one side half around 

 the trunk, was not attacked. Still another tree, with a long split or fissure in one 

 side, had been attacked last year and died on one side, but the other side was no" 

 attacked this year. One of two large living trees standing by the side of one that 

 died last year had two full-length Dendroctonus galleries in the bark, but no larvae. 

 One Tetropium pupa case was observed in the sapwood. 



Stumps of trees cut last year within 10 rods showed no evidence of attack 1 y 

 Dendroctonus, although Xyloterus (pupa? and immature adults) and small ba k 

 beetles were common. 



Group VI. 



This group is at Hamel's Camp, on the line of 5 R. 5 and 5 R. 4, within a mile 

 of the New Hampshire line. 



Trees girdled June 6. 



Tree No. 8: Diameter, 18 inches: heartwood decaying; external wound; one root 

 decayed; 100 yards from infested tree. October 9, tree broken off; bark dry; leaves 

 all fallen; Polygraphus abundant in bark, but no Dendroctonus. 



Tree No. 9: Diameter, 17 inches: thrifty, with sound roots; 50 yards from infested 

 trees. October 9, infested with Dendroctonus, pupae and adults, also Polygraphus 

 and Xyloterus; leaves fallen; wood drying and staining. 



Tree No. 10: Diameter, 14 inches; full crown and thrifty; 50 yards from infesled 

 trees. October 9, infested with some Dendroctonus; more Polygraphus; also 

 Xyloterus and a few Tetropium; leaves fallen and wood dying. 



Tree No. 11: Diameter, 18 inches; close to infested tree: full crown; unsound 

 roots; probably the lower portion of the trunk hollow. October 9, fallen: prob- 

 ably blown over about September 1; not attacked by insects. 



Tree No. 12: Diameter, 17 inches: sound roots and full crown; dead and infested 

 trees near by. October 9, infested with Dendroctonus; galleries abundant: adults 

 occur in small numbers; wood attacked by Xyloterus; bark dry and leaves fallen. 



Tree No. 13: Diameter, 19 inches; heavy crown and sound roots; 2 rods from 

 infested tree. October 9, infested with numerous Dendroctonus: 1, roods developed 

 to adults; Polygraphus and Tetropium in bark, and Xyloterus in wood. 



Tree No. 14: Diameter, 13 inches; standing among others of the same size and 

 larger: all thrifty; 3 rods to infested trees. October 9, infested with Dendroctonus: 

 fully developed broods; also infested with Polygraphus and Xyloterus: leaves 

 fallen; wood dry. 



Tree No. 15; Diameter, 16 inches; full crown and sound roots; standing close to 

 infested trees. October 9, infested by fully developed broods of Dendroctonus: 

 wood drying, but the majority of the leaves holding on. 



Peeled trees. 



About June 20 a considerable number of trees were peeled 5 feet up from base 

 by the loggers here. One was hack-girdled for peeling, but was not peeled. This 

 tree was attacked by Dendroctonus, and at this date, October 9, the bark is full of 

 half-grown larvae, but the leaves are green. Among a number of peeled trees 

 standing near girdled trees Nos. 9 and 10 one has a few Dendroctonus at the base; 

 another is infested with Polygraphus in large numbers and the leaves are falling: 

 another one is losing its leaves, but apparently not infested; still others are yet 

 living, but about half of them have a number of Dendroctonus galleries. 



