The Introduction of a European Scolytid (the Smaller ElmBark‐Beetle, Scolytus Multistriatus Marsh) Into Massachusetts

The Scolytidae are most generally known as bark-borers and consequently many entomologists have given the name of bark-beetles to the entire group.'They area very important group of insects in as much as they are very nearly all tree-feeders.For convenience they might be put into two classes, those that attack our conifers and those that work almost exclusively on our deciduous trees of the forest and shade varieties.We have found from experience in past years Just how important economically are the beetles of the class that infest our conifers, since they have caused a loss of several millions of dollars yearly to different parts of our country.'It looks now, from the bark-borer which has recently attacked our elms, as though we were going to have an opportunity to learn of the second class of beetles in the same manner.Europeans have had this problem confronting them for years and it has proved to be one of the most serious with which they have had to deal, because many of these beetles have become such exclusive feeders that they will attack only one kind of tree.