220 



ELM. — LAKCII. 



attack so long as the inexcusable practice continues oilcaring 

 trunks of infested Elms hjing, witli their hark still on, when 

 containing myriads of these maggots, which are all getting ready 

 shortly to change to inrfect beetles, and to fly to the nearest 

 groifing Elms. Such neglected trunks may be seen in our 

 parks and rural wood-yards all over the country, where, 

 without difficulty (as I have myself often found), the hand 

 may be run under the bark so as to detach feet and yards in 

 length from the trunk all swarming with white Scolytus 

 maggots in their narrow galleries. 



This bark, with its contents, ought never to he ijcrmitted to 

 remain. Where it is loose it may be cleared of many of the 

 maggots by stripping it off and letting the poultry have 

 access to it ; or, if still partly adhering, it may be ripped 

 from the wood by barking tools, and burnt, but if allowed to 

 remain swarming with maggots it is a tangible and serious 

 cause of injury ; and if our landed proprietors were fully 

 aware of the mischief thus caused to their own trees and 

 those of the neighbourhood they would quickly get rid of it. 



LARCH. 



Larch Aphis. L'hennes laricis, Hartig. 



Pemale, with eggs, winged specimen, and larva ; all magnified. 

 Twig, with females and eggs, slightly magnified. 



The attack of this Aphis, known also as Larch Chermes, 

 Larch Bug, or Larch Blight, causes injury by means of the 

 insects in all their stages piercing the tender bark or leaves of 

 the Larch with their suckers, and drawing away the sap. It 

 occurs on old as well as young trees, but is most injurious to 



