LIST OF TREES WITH INJURIOUS INSECTS. 



405 



Name of tree or 

 shrub affected. 



Name of insect. 



Broom 



Cherry (wild) 



Clematis 



Dog-Rose 



Douglas Fir 



Elder 

 Elm 



PMoeophthorus 

 dactylus. 



rhodo- 



Depressaria assimilella . 

 A sphondylia sarothamni 

 Jfyziis cerasi . 



Xylocleptes bispinus 



Rhodites eglanterice 



w rosw 



Aulacaspis rosce . 



Megastigmus spermo- 

 tropkus. 



Aphis sambuci 



Orchestes alni 



Scolytus destructor 



midtistriatus 



Hylesinus vittatus 



Nature of injuries. 



t'heimitobia brumata 



Beetle burrows under the 

 stems, and larva makes 

 irregular galleries. 



Larva? live on terminal 

 shoots, and knit shoots 

 together for protection. 



Produces galls on young 

 twigs. 



The Aphides injure the 

 foliage by causing a 

 rough rosette of leaves 

 on terminal shoot. 



Female beetle burrows in 

 twigs. 



Produces small round galls 



on under surface of leaf. 

 Produces " moss " galls on 



shoots. 

 Produces white scaly 



covering on stems. 

 Larvae feed on kernel of 



seeds. 



Insects live in clusters on 

 young shoots. 



Larvae injure the foliage, 

 and beetles perforate 

 the leaves. 



Female beetle makes a 

 perpendicular gallery 

 under thick bark, and 

 larvse irregular radiat- 

 ing galleries. 



Female beetle makes a 

 perpendicular gallery 

 under thin bark, and 

 larvae irregular radiat- 

 ing galleries. 



Female beetle makes a 

 double-armed horizon- 

 tal gallery under bark 

 of branches, and larvae 

 make short galleries at 

 right angles to mother 

 gallery. 



Larvae eat foliage in early 

 summer. 



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