FOREST PROTECTION 



29 



INSECT FAMILIES ARRANGED ACCORDING TO FOOD OBJECTS 

 IN THE FOREST. 



Compare Page of 

 Ent. Bul. No. 48 

 I. Infesting the Cambial Bark. 



Bark Beetles Scolytidse (excepting Platypini, larvae and adults) ... 9 



Flat and round Buprestidse, Cerambycidae (mines often extending into 

 headed borers: wood prior to pupation) 10 



Bark weevils: Curculionidse 10 



Powder post 



beetles: Ptinidse, (in peeled tan bark) 11 



II. Infesting the Wood. 

 Ambrosia or 

 timber beetles: Scolytidse (larvae and adults) 10 



Wood-boring 



caterpillars: Sesiidae 10 



True woodboring 



beetle-grubs: Lymexilonidae, Brenthidae 10 



Bark and wood 



boring grubs: Curculionidae, Cerambycidae, Buprestidae 10 



Carpenter worms: Cossidae 11 



Horn tails: Siricidae 11 



Powder post 



beetles: Lyctidae, Ptinidae, Bostrichidae (dead wood only). . . 11 



III. Injuring Leaves or Needles. 

 True Caterpillars 

 and measuring 



worms: Lepidoptera (practically all families of the order). . . 11 



False caterpillars Tenthredinidae 12 



Leaf beetles: Chrysomelidae 12 



Gall insects: Cynipidae, Cecidomyiidae, Aphididae 12 



Plant lice: Aphididae, Psyllidae 12 



Scale insects: Coccidae 12 



IV. Infesting Twigs. 

 Twig mining 

 beetles: Scolytidae, Buprestidae, Cerambycidae 12 



Twig weevils: Curculionidae 13 



Twig caterpillars: Tineidae, Tortricidae 13 



Scale insects: Coccidae 13 



Plant lice: Aphididae 13 



Gall insects: Cecidomyiidae and Cynipidae 13 



Cicadas: Cicadidae 13 



V. Infesting Young Seedlings in Nurseries. 



Cutworms: Noctuidae 



Junebugs: Scarabaeidae 



