116 
THE SCOLYTID BEETLES. 
to deposit eggs. The work of excavating galleries and depositing 
eggs is principally during June and July, but may be continued until 
September, or later (as evidenced by the finding of young larvae in 
October, and the same, after overwintering, the following May.) 
Fig. 71. — The eastern spruce beetle. Egg gallery and larval mines: a. Egg gallery; b, boring dust 
packed in gallery; c, entrance and subsequent or inner gallery: d. larval mines. (Author's illus- 
tration.) 
The overwintered broods of larva? begin activity during the last 
week in May and first week in June. The matured larva? begin to 
transform to pupa? and adults during the first week in June, and con- 
tinue to do so, while the younger larva? are developing, until July or 
later. All have evidently transformed and emerged by the middle 
of August, or earlier. 
