34 



tonus, also numerous Polygraphus in bark, the sapwood being stained one-half 

 inch deep. On October 4 the bark was dry all around and the leaves falling. Den- 

 droctonus larva?, pupae, and recently developed beetles being common above 

 girdle and Polygraphus more numerous below. 



Tree No. 28: Diameter, 16 inches: hollow at base and with thin crown: close to 

 infested trees. July 9. not attacked. October 4. two Dendroctonus galleries close 

 to girdle, but no eggs or larva?; not attacked by Xyloterus even at girdle. 



On July 9 a large tree standing by No. 27 was found to be attacked by large 

 numbers of Dendroctonus. and by October 4 was dead and the leaves fallen. 

 Another tree 18 inches in diameter near No. 28 was lightly attacked by Dendroc- 

 tonus. and by October 4 showed numerous short galleries, but no eggs or larva?. 

 On October 4 it was noted that a 13-inch spruce, standing between two large 

 infested trees 10 feet apart, had been attacked in 1899, but recovered, and was not 

 again attacked this season. On July 9 numerous trees halfway between No. £6 

 and the infested trees, as well as one large tree near them, were not attacked. 

 On June 19 I saw no signs of the beetles emerging from the infestel trees, and no 

 trees near by were being attacked. I found, however, not far away, in a stump 

 of a tree cut last winter, four Dendroctonus galleries, and more on July 9, with 

 many Xyloterus entering the wood, but could find no other stumps or tops of felled 

 trees which were infested with the Dendroctonus. 



Group II. 



This group is on Wighfs "tote'" road, higher up the mountain, halfway to 

 Cupsuptic divide, and in the vicinity of numerous infested trees attacked the 

 summer of 1899. 



Trees girdled May 29. 



Tree No. 4: Diameter. 20 inches: close to infested tree. June 19, infested by 

 Dendroctonus. July 11, abundantly infested, the galleries being as much as 3 

 inches long and containing eggs: Xyloterus common, entering wood at girdle and 

 elsewhere. September 1. many of the leaves had fallen, and recently developed 

 beetles, pupae, and large larvae were found in the bark, with no trace of parasites. 

 October 4, all the leaves fallen: numerous nearly matured adults of Dendroctonus, 

 with few larvae and pupae. 



Tree No. 5: Diameter, 16 inches; 40 feet to nearest infested tree. June 19, 

 infested by Dendroctonus. July 11. Xyloterus in the wood and Dendroctonus in 

 the bark, but apparently not in great numbers. September 1. Dendroctonus 

 abundant, with pupa? and large larva?; majority of the leaves fallen. October 4. 

 leaves nearly all down: recently developed beetles, some fully matured: also large 

 larva? and pupae, with some parasites and one Tetropium larva. 



Tree No. 6: Diameter, 15 inches: belt girdled by removing a belt of bark 8 

 inches wide; located 50 feet away from nearest infested tre?. June 19, infested by 

 Dendroctonus. July 11, galleries 3 inches long, with eggs. September 1. major- 

 ity of leaves fallen: Dendroctonus abundant in bark. October 4, leaves nearly all 

 down; pupae, matured larva?, and recently developed beetles of Dendroctonus. 

 with a few parasites: also a smaller bark beetle than Dendroctonus. 



Tree No. 7: Diameter. 22 inches; girdled bv cutting through the sapwood. 

 June 19 and July 11, not infested. September 1, m.^st of the leaves fallen and the 

 wood is drying without staining: a few, possibly eight, Dendroctonus galleries 

 observed, but very short and without eggs or larva?: also some Polygraphus and 

 several Tetropium larvae in bark. October 4, same condition; wood not stained. 



Trees girdled September /. 



Tree No. 43: Diameter, 13 inches: a few rods from infested trees. October 4, 

 not infested and in normal condition. 



Tree No. 44: Diameter. 13 inches. October 4, in normal condition. 



