Forest entomology . Fig. 93.—Markings o/Hylesinus crenatus on aJ\ stemafter removal of bark. COLEOPTEHA—SCOLYTIDJ5. 103. and whip clothed -with long ciliate hairs. The elytra are very coarselystriated, thus imparting to the insect a rather rough legs are generally pitchy black. The larva? are long, legless, white maggots, with brown head andjaws. They pupate just immediately beneath the outer skin of therough bark, so that in looking for the full-fed larvse we must dig verylightly. To prevent the spread of this insect, it is best to cut down allback-going old trees with very rou
Forest entomology . Fig. 93.—Markings o/Hylesinus crenatus on aJ\ stemafter removal of bark. COLEOPTEHA—SCOLYTIDJ5. 103. and whip clothed -with long ciliate hairs. The elytra are very coarselystriated, thus imparting to the insect a rather rough legs are generally pitchy black. The larva? are long, legless, white maggots, with brown head andjaws. They pupate just immediately beneath the outer skin of therough bark, so that in looking for the full-fed larvse we must dig verylightly. To prevent the spread of this insect, it is best to cut down allback-going old trees with very rough bark ;and this is in keeping with good forestry,as an ash-tree, above all others, depreciatesvery rapidly in value if left standing afterit has reached maturity. Hylesinus fraxini (Fabr.) This species is commonly known as the ashbark beetle. Miss Ormerod, in her valuablework, says : The beetles are often attractedin large number by newly felled ash trunks,in the bark of which they propagate, andfrom whence the new brood spreads tothe neighbouring trees, mainly attacking those that are sickly ordecayed, or young
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