THE SPRUCE GAL\.-LOVSE—(Chermes ahietis.) 



Prepared for the Bureau of Forestry by Wm. Brodie^ Toronto. 



Fig. 1379.— Gall infested Fio. 1380. 



twig as seen in fall. 



7N the spring of 1897 many spruce 

 trees in and around Toronto were 



J found to be more or less injured by 

 a pseudo-gall insect. The galls were 

 enlarged and deformed buds of the pre- 



-Infested twig of European Spruce, found 

 in Toronto, April, 1S98. 



vious year, usually towards the tips of 

 the twigs. Investigation showed that 

 these galls were form.ed by a small in- 

 sect popularly called the spruce gall- 

 louse, the Chermes abietes of entomolo- 



FlG. 1381. — Mature gall louse, magnified 25 diameters, 

 collected September 1st, 1897. 



2 269 



Fig. 1382.— Immature gall-louse 

 immediately after issuing from 

 scales of gall, Aug. 18th,il897. 



