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. Annual report of the Trustees of the State Museum of Natural History for the year ... Science; Museums. Report of the State Entomologist. 233 This species lias not yet, to my knowledge, shown itself as a museum pest, feeding upon objects of natural history, bu.t it may become so enrolled at any day, in the comjDany of two of its congeners — Ptinus fur Linn., as recorded by Dr. Hagen,* and Ptinus quadrimaculatus Melsh., from my own experience. Several examples of the latter were discovered, dead, in the month of February, in a case of dragon-flies which had been received the preceding summer from South Britain, Conn. Two examples of the same had previously occurred in another case of insects, in which they had evidently undergone their trans- formations and committed some damage. Xylotrechus colonus (Fabr.). (Ord. Coleoptera: Fam. Ceeambycid^.) Fabeicius : Syst. Ent., 1775, p. 91; Syst. EL, 1801, p. 345 (Glytus). Olivier: Ent., iv, 1795, genus 70, p. 31, t. 6, flg. 67 (as Gallidium). LeConte: in Journ. Acad. Nat. Sci. Phil., ser. 2, ii, 1850, pp. 28, 104 (as C. agrestis). Melsheimer: Cat. Coleop. U. S., 1853, p. 105 (as Glytus campestris). Peovancher: Pet. Faun. Ent. Can.— Coleop., 1877, p. 599 (description). Packard : Bull. 7, U. S. Ent. Comm.—For.-Sh. Trees, 1881, p. 27 (as Glytus, pupa descr.), p. 114 (mention); 3d Eept. U. S. Ent. Oomm., 1883, p. 258 (description of larva), pi. xii, figs. 2, 2a, 3. Eilet : in Amer. Ent., iii, 1883, p. 239 (bred from oak). Henshaw: List Coleop. N. Amer., 1885, p. 99, No. 6179. Leng : in Ent. Amer., ii, 1887, p. 200 (European synonymy and references). The Beetle Described. The following description of the beetle is that given by I'abbe Pro- vancher, loc. cit. It is stated to be a common species in Canada: Brown, more or less deep. Front with two approach- ing longitudinal carinas, a little more separated between the antennai. Antennse reddish, lighter at the extrem- ities. Prothorax with numerous fransverse strise, sub- cyl