Larch insects 

 Woolly larch aphid, Chermcs strobilobius Kalt. 



1 Young on leaf, showing- the cottony fihiments and near by the egg of a 



predaceous syrphus tly, very much enlarged 



2 Young aphid, very much enlarged 



;; Woolly females on leaves, natural size 



4 ligg mass at base of a whorl of leaves, very much enlarged 



Larch case bearer, Coleophora laricella Hiibn. 



5 Mined tips of larch needles, showing hole through which the cater[)illar 



feeds, much enlarg(;d 



6 Caterpillar partly out of its peculiar case, much enlarged 



7 Larva very much enlarged 



8 Cocoon much enlarged 



9 Moth much enlarged 



10 Case bearers on the leaves, natural size 



Larch sawfly, Ly gae o n c in a t u s criclisonii Hartg. 



11 Larvae on foliage, showing characteristic positions 



a 372 



