APPENDIX. 



The following notes, from subsequent observations on a few of the 

 more important destructive species, are offered with a view of sup- 

 plementing the information already given in this volume. 



Nematus Erichsonii, Htg. 



As this is a scheduled insect, I asked and obtained permission from 

 the Board of Agriculture to keep a few in strict confinement for obser- 

 vation purposes. I found that in practically all cases the various life- 

 history stages coincided with the observations given by Mr Gordon 

 Hewitt.^ 



On June 1, 1910, eggs were deposited in the main stem of a young 

 larch-tree three years of age, which was grown purposely in a flower- 

 pot. They were de- 

 posited in the crevices 

 of the bark and in 

 double rows. The posi- 

 tion of the eggs was not 

 easily determined until a 

 few days before hatching, 

 when the expanded eggs 

 lacerate the bark and so 

 kill the twig. They are 

 whitish in colour, pointed 

 at both ends, somewhat 

 after the shape of an 

 ordinary hen's egg. 

 The larvcB hatched on 

 June 15, or fifteen days after egg-deposition. Amongst 100 specimens 

 hatched from larvae received from the Lake district the previous year, 

 all were females. Fig. 353 is a microphotograph of the saw or boring 

 apparatus of the female. 



Eegarding remedial measures for this insect, it may be said that a 

 deal of good work has no doubt been done by many writers drawing 



1 The Journal of the Board of Agriculture, December 1908. 



Fig. 353.- 



Neniati 



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