ELM-BARK BEETLE. 



113 



point out could be done, it would be an enormous 

 saving to them and to the nation. 



But to return to Weevil attacks. There is a class 

 of Weevils which do much barm to some of our forest 

 trees, which may be just alluded to, as the carrying 

 out of farm service much depends on sufficient timber 

 supply. 



Fig. 87 shows workings of the Elm-bark Beetle 

 (much like those of the Pine-bark Beetle) ; and 

 Fig. 88, of the Ash-bark Beetle, which has the 

 entrance-tulmel in the centre, and is then forked. 



These various Beetles burrow under the bark, or 

 rather between the wood and the bark, and form 

 tunnels an inch to two or more in length, and along 

 each side of these the female lays her eggs. Each 

 grub hatched from these eats for itself a tunnel, run- 

 ning more or less at right angles with the mother's 

 gallery, and at the end of these tunnels the grubs 

 turn to chrysalids, from which, when the Beetles 

 develop, they gnaw their way through the bark. 



— Maggot workings in Ash bark 



These Beetles mainly attack, for egg-laying, either 

 newly-felled trees, or unhealthy timber, or broken 

 timber or stumps left lying about; but though in 



