414 



FOREST ENTOMOLOGY. 



Name of tree or 

 shrub affected. 



Name of insect. 



Spruce . . Trypodendron lineatum 



Lygceonemetus saxeseni 

 Sirex pivencus 



Physokermes abietis 



Dioryctria abietella 

 Aphis abietina 



Chermes abietis 



Sycamore . Phyllocoptes acericola 



1 Lecauium caprece 



Cheimitobia brumata 



Hybemia defoliaria 

 ii . Stigmonota regiana 



Drepanosiplmm platan- 

 oides. 



Chaitophorus aceris 



Wayfaring- Eriophyes tetanothrix 

 tree. 



Aphis viburni 



Nature of injuries. 



"Weymouth 



Pine. 

 Whin . 



Willow (goat) 



Chermes corticalis . 



Phlceophthorus rhodo- 

 dactylus. 



Eriophyes tetanothrix . 



Female beetle burrows 

 into sapwood towards 

 centre of tree. Larvae 

 make short ladder gal- 

 leries. 



Larvae live on foliage, 

 often defoliating the 

 extreme twigs. 



Larvae bore into back- 

 going trees or recently 

 felled timber. 



Brown scales in forkings 

 of twigs. 



Larvae live on cones 



Insects often found plen- 

 tifully amongst foliage. 



Insect forms pseudo-gall 

 on shoots. 



Causes small galls on 

 upper surface of leaf. 



Large brown scale on 

 twigs. 



Larvae eat foliage in 

 early summer. 



Larvao live on foliage 



Larvae underneath flakes 

 of old bark. 



Insects may be found 

 under the leaves 

 throughout the whole 

 summer. 



Insects may be found 

 under leaves during 

 the summer. 



Causes galls on upper 



surface of leaf. 

 Insects form a rough 



rosette of leaves on 



terminal shoot. 

 Insects live within woolly 



covering on stems. 

 Beetle burrows under the 



stems, and larvae make 



irregular galleries. 

 Causes galls on upper 



surface of leaf. 



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30 

 305 



331 

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29 



1 Also on hawthorn, apple, oak, elm, chestnut, lime, &c. 



