Head and thorax black; the former very broad. Antennæ are black. Abdomen dark green, almost black. Scutellum obsolete. Elytra rather longer than the thorax, furrowed and black, slightly margined; just above which, all round their external edges, they are of a dirty clay colour. Anus the same.
PLATE XXXVII.
PRIONUS (ORTHOSOMA) PENSYLVANICUS.
Plate [XXXVII]. fig. 1.
Order: Coleoptera. Section: Longicornes. Family: Prionidæ, Leach.
Genus. Prionus, Fabr. Cerambyx, Linn. Subgenus: Orthosoma, Serv.
Prionus (Orthosoma) Pensylvanicus. Obscurus, thorace marginato tridentato, pectore abdomineque ferrugineis, antennis brevibus. (Long. Corp. 1 unc. 6 lin.)
Syn. Cerambyx Pensylvanicus, De Geer Mem. 5. p. 99. t. 13. f. 13.
Cerambyx unicolor, Drury. App. vol. 2.