35 



Tree No. 45: Diameter, 13 inches; near infested trees. October 4, in normal 

 condition. 



Of the four trees girdled here May 29, three were infested by Dendroctonus June 

 19, this being the first new work of the season observed. Some of the galleries 

 were then 3 inches long. They had numerous eggs, and one ventilation hole was 

 observed started, but not through. The beetles in the galleries in some cases were 

 both black, and in others both bronze, or one bronze and one blac^. 



In order to get further information in this locality, a half acre was laid out by 

 guess, which included all the girdled trees as well as the dead ones and those 

 infested last year. All of the trees were examined and their local relations to the 

 probable source of infestation noted on June 19. The conditions were again 

 studied on October 4, and the resu.ts are given below. Ail trees 10 inches or less 

 in diameter standing on the half acre are omitted. 



Condition of trees, over 10 inches in diameter, on one-half acre of land. 



s 



Q 



Condition June 19. 



Condition October 4. 



In. 

 20 



Killed in 1898 or 1899 





18 



Killed in 1899; infested with Dendroctonus 



Sapwood brown and soft; Polyporus fungus 





pupae, etc. 



on bark. 



22 



Killed probably in 1898 .. 





25 



Killed in 1899, infested with Dendroctonus 

 pupae, etc. 



Sapwood brown and soft. 



22 



Killed in 1899; infested with pupae and 



Sapwood brown, streaked and softening. A 





beetles. 



few Polyporus on bark. 



17 



Killed probably in 1898 



Sapwood on one side rotten; remainder 







brown and softening; Polyporus on bark. 



18 



Killed two or three years ago 





16 



Attacked last year, but not this; leaves green, 

 but wood and bark drying. 



Leaves fallen; wood and bark dry. 



20 



Hack-girdled; attacked by Dendroctonus. 

 (Tree No. 4, Group II. ) 



Leaves all fallen: wood and bark drying. 



13 



Two roots extending into road damaged; 

 attacked by Dendroctonus. 



"Wood dry; leaves falling. 



18 



Attacked by Dendroctonus - - . . . 



Majority of leaves fallen; wood dry and 



browning. 

 All dead; leaves fallen; sapwood browning. 



20 



Probably infested last year and again this; 





bark dead on one side. 





22 



Girdled through sapwood; not attacked. 



Wood drying without stain; 8 Dendroctonus 





(Tree No. 7, Group II.) 



galleries without progeny. 



14 



Attacked by Dendroctonus last year; not 



Not attacked; living bark covering scars; 





again this; strip of bark and wood on one 



leaves still green. 





side dry; top green. 





13 



Attacked last year; infested with beetles 



Previously dead wood decaying; leaves yel- 





and pupae; no fresh infestation: part of 



low and majority fallen. 





wood dry; top green; Xyloterus in roots. 





15 



Attacked last year, but no work of larvae; 

 not attacked this year. 



Not attacked; old scars healing. 



15 



Belt-girdled: attacked. (Tree No. 6, Group 

 II.) 



Hack-girdled; attacked. (Tree No. 5, Group 

 II.) 



Hollow at base; small crown; lightly at- 

 tacked. 



Attacked this year _ 



Dead; leaves nearly all fallen. 



IB 



Majority of leaves down. 



12 



Larvae and pupae of Dendroctonus abun- 

 dant. 



Dying all around; leaves nearly all fallen; 

 infested by Dendroctonus and Tetropium. 



18 







15- 



Not infested ...' 



Not infested. 



14 



do... 



Do. 



11 



...do 



Do. 



12 



do 



Do. 



13 



do. . 



Do. 



14 



do 



Do. 



15 



do 



Do. 



IB 



do... 



Do. 



11 



do 



Do. 



18 



do 



Attacked and killed; leaves fallen; strips of 







wood browning. 



12 



Pine thrifty tree 



Infested; many Dendroctonus galleries, but 

 no eggs nor larvae; leaves not fallen. 







20 



A heavy-crowned tree 



Abundantly infested by Dendroctonus, 

 mainly in pupa stage; leaves not fallen. 







15 



Living 



Abundantly infested; bark dry all around; 

 leaves not fallen. 







12 



Not attacked 



Not attacked. 









