81 



6. Cerostoma xylostella (diamond-backed moth) ; perfect in- 

 sect, with enlarged drawing ; sketch of larva and cocoon on leaf. 



7. Model of turnip with incipient swellings, probably due to 

 attacks of insects in a younger state. 



E. 133. 1886. 



Insects injurious to Fir-trees (Timber and Foliage). 



1-4. Lachnus pinicolus : perfect insects and larvae, with 

 enlarged drawing of the same. 



5-7. Chermes laricis : perfect insects and infested branch ; 

 enlarged drawings of globule of resin with cotton, female deposit- 

 ing eggs on larch leaf and pseudova deprived of their cotton-like 

 covering. 



8-] 5. Chermes abietis : perfect insects and gall after the escape 

 of the flies ; model of gall ; enlarged drawings of perfect insect, 

 larva, and pupa, as well as of a gall from outside and in section ; 

 sketch of twig with incipient gall. 



16-18. Adelges picece : bark with secretion left by insects ; 

 infested twig and sketch of infested branch. 



19, 20. Otiorhynchus fuscipes : perfect insects and enlarged 

 drawing. 



21. Rhagium bifasciatum : perfect insect. 



22, 23. Rhagium, inquisitor : perfect insect and slightly en- 

 larged drawing of larva. 



24-30. Fidonia piniaria (bordered white moth): perfect 

 insects and drawings. 



31-38. Liparis monacha (black arches moth) : perfect insects 

 and drawings of same ; sketch of eggs on bark and of caterpillar 

 on branch of tree ; pupa. 



39-43. Trachea piniperda (pine beauty moth) : perfect insects 

 and drawings, larva on twig ; sketches of eggs on leaf. 



44-45. Retinia buoliana (pine shoot tortrix) : perfect insects 

 with enlarged drawing. 



46. Retinia turionana: sketch of pine bud with larva 

 inside. 



47-53. Lophyrus pini (pine saw-fly) : enlarged drawings of 

 perfect insect, male and female, larva and pupa ; cocoon. 



54-57. Sirex juvencus (steel-blue sirex) : perfect insects with 

 enlarged sketch of larva ; timber bored by latter. 



58-61. Sirex gigas (giant sirex) : perfect insects, male and 

 female, and larva ; timber bored by the latter. 



E. 138. 1886. 



Insects injurious to Fir-tree (Bark). 



1-3. Pissodes notatus : perfect insects with enlarged drawing 

 and sketch of injured branch. 



4, 5. Pissodes pini : perfect insect and enlarged drawing. 



