Forest entomology . s also beenfound on the spruce. It prefers poles, but may attack 50- to 70-years-old trees. The mother-galleries are large, regular, double-armed, andhorizontal, with a rather long entrance-burrow, and groove the sap-wood deeply. The injury which its breeding causes is thereforegreater than that of H. piniperda, as the circulation of the sap ismore endangered by these horizontal galleries. It is not, therefore,surprising that quite sound trees are killed by it, or, at any rate,become stag-headed. The larval galleries are short, not very numerous, and terminate COLEOPTERA SC
Forest entomology . s also beenfound on the spruce. It prefers poles, but may attack 50- to 70-years-old trees. The mother-galleries are large, regular, double-armed, andhorizontal, with a rather long entrance-burrow, and groove the sap-wood deeply. The injury which its breeding causes is thereforegreater than that of H. piniperda, as the circulation of the sap ismore endangered by these horizontal galleries. It is not, therefore,surprising that quite sound trees are killed by it, or, at any rate,become stag-headed. The larval galleries are short, not very numerous, and terminate COLEOPTERA SCOLYTIDvE. 113 in a deeply cut pupal chamber. This beetle, unlike the precedingspecies, is said not to confine itself to the borders of a pine wood, butto be found deeper in its interior. II. minor also bores into the pith of young pine shoots in thesame way as H. Genua Phlceophthorus. Antennal whip five-jointed; club of antennae three-jointed and verydistinctly divided ; abdomen not raised towards
Size: 874px × 2859px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublisheredinburghwblackwoo
