2(1} ilEi'OUT OF THE DeI'aUTMENT OF EMUiJOLOUY OP THE 



The most extensive injury was in the Crawford and Reeves 

 Favorite orchards. In these orcliards nearly every tree was 

 infested to an equal or greater extent than the piece of barli 

 shown in the photograph. Tlie Globe orchard was of especial 

 interest as it had become infested in one corner from a nearby 

 brush pile, in which the beetles had been breeding, and the 

 rapid spread of the insect through the orchard was plainly indi- 

 cated. 



Character of the ohannds in the harJc of the trunks and lower 

 limhs. Feeding habits of the beetles. — On September 20, pieces of 

 bark from a number of the infested peach trees were examined. 

 Probably owing in part to recent rains the sap was very soft. 

 Comparatively few beetles could be found, and judging from 

 the lack of dust, only an occasional one had been recently at 

 work. Pieces of bark containing beetles were brought to the 

 laboratory, some of them allowed to dry and others were kept 

 moist for a few days. It was very noticeable that as soon as 

 the bark became somewhat dry the beetles began feeding, while 

 there was very little evidence of activity on the part of the 

 beetles in the moist pieces. As soon as the pieces that had 

 been kept moist were allowed to dry the beetles began to work. 

 All of the mines in the bark examined September 20 were very 

 irregular but with few exceptions, short. 



In October the orchard was again visited. At this time the 

 bark was comparatively dry, and most of the sap had dried 

 down until quite brittle. All over the infested areas the red 

 dust was in abundance, and when the bark was cut away the 

 beetles were found at worlv making new galleries or extending 

 the old ones. The galleries ran in all directions but very few of 

 them reached the sap wood. 



As on September 20, large pieces of bark were brought to the 

 laboratory and carefully examined for eggs or larva3. Neither 

 were found, although the beetles were present in large num- 

 bers. 



Very few of the small branches and twigs of any of the trees 

 in these orchards or in nearbv orchards showed the work of the 



