37 



Trees girdled July 11. 



Tree No. 35: Diameter, 15 inches: 50 feet from infested trees. September 1, 

 two Dendroctonus galleries, but without larvae no Xylotertis. October 4, same 

 condition. 



Tree No. 36: Diameter, 15 inches. September 1. lightly infested by Dendrocto- 

 nus, with small larva?. October 4, thickly infested; bark drying all around; larva? 

 half grown. 



Tree No. 37: Diameter, 18 inches; 30 yards from infested tree. September 1, 

 thoroughly infested by Dendroctonus; half grown larva?; leaves beginning to fall. 

 October 4, medium and large larva? abundant; bark dying; leaves partly fallen. 



Tree girdled September 1. 



Tree No. 40: Near No. 37. October 4, not attacked. 



Aside from ihe trees mentioned above, girdled and ungirdled, no other trees 

 were attacked in the immediate vicinity of this group; therefore, it would appear 

 that the girdled trees had exerted considerable influence in attracting the beetles. 



Group IV. 



This group of trees is situated on the trail north of Wighfs Camp. 



Trees girdled Jidy 11. 



Tree No. 31: Diameter, IS inches: away from infested trees. October 4. not 

 attacked by any insect. 



Tree No. 32: Diameter. 17 inches; near No. 31. October 4, three Dendroctonus 

 galleries about 3 inches long; one at the girdle. 



Tree No. 33: Diameter, 20 inches; standing with trees girdled last year: no liv- 

 ng beetles found in the bark. September 1 and October 4, not attacked even by 

 Xyloterns. 



Tree No. 34: Diameter, 17 inches: away from infested trees. September 1 and 

 October 4, not attacked. 



Trees girdled September 1. 



Tree No. 41: Diameter, 13 inches: standing among dead and infested trees 

 October 4, no evidence of attack; mold in the girdle. 



Tree No. 42: Diameter, 14 inches. October 4, not attacked. 



Group V. 



This group stands near the outlet of Big Island Pond at the head of Kennebago 

 River, where much infested timber was observed on date of girdling. 



Trees girdled June 16. 



Tree No. 21: Diameter, 16 inches; standing among infested trees. July 28, a 

 few Xyloterus entering at girdle, but no Dendroctonus. August 11, same condi- 

 tion. 



Tree No. 22: Diameter, 16 inches; near infested trees. July 26, one Dendrocto- 

 nus and a smaller species at girdle. August 11: two Dendroctonus, with larva? in 

 bark below girdle. 



Tree No. 23: Diameter, 17 inches; with hollow base but externally sound roots; 

 close to infested trees. July 26 and August 1 1 , not attacked. 



On July 26 no recent infestations were observed in this locality, although many 

 badly-infested trees were observed here on June 16, in which Professor Hopkins 

 found a far greater number of parasites and predaceous beetles than had been 

 found in any other locality. On August 11 a group of three infested trees was 

 found, which was probably overlooked in July. One of them was inlested by 



