Forest entomology . beforethe escape of the larvae and burned. Genus Tardyi (Curt.) This beetle is considered almostexclusively an Irish species. It isM injurious to half-dead beech tim-ber, and it may therefore be saidFig 81~RhopTiomeS tE&l** that {t considerably hastens its decay. Fig. 81 is a representationof the damage done to half-decayed beech planking. I am indebted toProfessor Carpenter, Dublin, for the specimen from which the photo-graph is References to Literature consulted. Altum. Forstzoologie, iii. Carpenter, G. H. Entomological Papers. Fisher
Forest entomology . beforethe escape of the larvae and burned. Genus Tardyi (Curt.) This beetle is considered almostexclusively an Irish species. It isM injurious to half-dead beech tim-ber, and it may therefore be saidFig 81~RhopTiomeS tE&l** that {t considerably hastens its decay. Fig. 81 is a representationof the damage done to half-decayed beech planking. I am indebted toProfessor Carpenter, Dublin, for the specimen from which the photo-graph is References to Literature consulted. Altum. Forstzoologie, iii. Carpenter, G. H. Entomological Papers. Fisher, W. R. Forest Protection. Fowler. British Coleoptera. Judeich und Nitsche. Forstinsektenkunde. Kaltenbach. Die Pflangenfeiude. MacDougall, Dr R. Stewart. The Biology of the Genus Pissodes. Nisbet. The Forester. Nusslin. Leitfaden der Forstinsektenkunde. Ormerod, E. A. Manual of Injurious Insects. Packard. Insects Injurious to Forest Trees. Rye. British Beetles. Theobald. The Animal Pests of Forest 1 Comparatively rare in England. Commander Walker has taken it at Ply-mouth, and has it from the Hastings district. 85 CHAPTER III. COLEOPTERA—SCOLYTID^E (Bark-Beetles). From the point of view of forest entomology, one of the most im-portant groups of insects is that of the beetles known as Scolytidre,inasmuch as they are practically all tree-feeders. As a general rule,they attack only dead, dying, or back-going trees, and therefore it ispossible that, from a purely economic point of view, their importancemay have hitherto been over-estimated by many writers. At thesame time, there are a few exceptions to this general rule. For in-stance, in one stage of its life-history Hylurgus [Hylesinus) piniperdaattacks the healthy shoots of Scots pine trees ; and Pityogenes biden-tatus often attacks sickly and unhealthy young trees, and thus killsoutright what otherwise would have recovered. Many of the beetles are exceedingly small in size, which fact, coupledwith their minute
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