There are other long-horned beetles (_Cerambycidæ_) that are occasionally found breeding in the hickories, and among these may be named the Belted Chion (_Chion cinctus_), Tiger Goes (_Goes tigrinus_), Beautiful Goes (_Goes pulchra_), and the Orange Sawyer (_Elaphidion inerme_), but they are usually quite too rare to be considered as very destructive insects. HICKORY-BARK BORER (_Scolytus 4-spinosus._ Say).--Only once within my memory has this minute but destructive beetle appeared in any considerable numbers in my neighborhood, although I have occasionally received a few specimens from correspondents in various parts of the country, even as far west as the Pacific coast in Washington. This borer is a very small, cylindrical, dark brown beetle, about one-fifth of an inch or less in length, and one-sixteenth in diameter. The hind part of the body is quite blunt (truncate), the males having four short but distinct blunt spines, two on each side, projecting from the hind part of the abdomen, hence the name "4-spinosus." In the females these spines are absent, otherwise they closely resemble the males. These bark borers usually appear here in the Northern States the last of June or early in July, and both sexes attack hickory trees of all species, but appear to prefer the old and nearly mature trees to the young and small with thinner bark. After boring through the bark and reaching the soft cambium layer underneath, upon which these insects feed, the female cuts a vertical channel in this substance, of little over an inch in length. [Illustration: FIG. 72. BURROWS OF HICKORY SCOLYTUS.]