412 



FOREST ENTOMOLOGY. 



Name of tree or 

 shrub affected. 



Name of insect. 



Scots Pine . Rhagium bifasciatum 



Hylobms abietis 



Pissodes pint 



1 1 notatus 



Hylastes ater 



Hylurgus piniperda 



n minor 



Pityophthorus pubescens 



Tomicus sexdentatus 



ii acuminatus 



Pityogenes bidentatus , 



Lophyrus pirn 



ii rufiis 

 Fidonia piniaria . 

 Trachea piniperda 



Nature of injuries. 



Insects often found in 

 very dry dead stand- 

 ing trees. 

 Larvae live in roots. The 

 beetle is very destruc- 

 tive to shoots of young 

 trees. 



The larvae live under bark, 

 and pupae form cocoons 

 in dead or back -going 

 young trees. 



Larvae burrow under bark 

 of stem close to roots 

 of young trees. 



Female beetle makes short 

 gallery under bark and 

 close to stem of young 

 trees. 



Female beetle burrows 

 under bark of newly 

 felled or back - going 

 trees. Larvae make ir- 

 regular galleries. The 

 beetle also bores out 

 the young shoots. 



Beetle burrows under 

 bark. Larvae make 

 short galleries. 



Female makes burrows 

 in stems of young 

 plants. 



Female said to burrow 

 in dead trees 

 London. 



Beetle burrows in 

 Both beetle and 

 make irregular 

 leries. 



Male burrows under thin 

 bark and makes a cir- 

 cular chamber, whence 

 female beetles make 

 radiating galleries and 

 larvae irregular gal- 

 leries. 



Larvae feed on foliage 



Larvae feed on foliage 



Larvae live on foliage 



Larvae live on foliage 



near 



bark. 



larvae 



gal- 



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