212 THE CANADIAN ENTOMOLOGIST 7. Lachnus Burmeister, v Syn. Lachniella Del Guercio. Type L. fasciatus Burm. Since no type had previously been established for Lachniella, and since the genus contained a number of diverse species the placing of it thus, according to the writer's reasoning, indicates /a5a'a/;^5, one of the included species of Lachniella as its type. Otherwise there would be no reason for so placing the genus. In his most recent paper (1919) Wilson has used Lachniella in quite a different sense, and would exclude fasciatus from the genus. This species, the present writer contends, is the only one that has in any way been suggested as type of Lachniella, and he believes that it is the type of the genus. Otherwise the genus is without a type. This leaves the genus Lachniella of Wilson without a name, and to this genus we give the name Wilsonia and fix Lachniella gracilis Wilson as its type. The different genera with designated types will thus stand as follows, at least until some definite ruling has been made changing the present ligitimate type of Lachnus. Genus Lachnus Burm. — Type Lachnus puncMiis Burm. Genus Lachniella Del Guercio — Type Lachnus fasciatus Burm. Genus Wilsonia Baker — ^Type Lachniella gracilis Wilson. References. 1835. Burmeister — Handbook Entom. II, p. 91. 1840, Westwood — Int. Mod. Class. Insects II, Synopsis, p. 118. 1863. Passerini — Aphidida? Italics, p. 62, 1908. Mordwilko— Ann. Mus. Zool. de L'Acad. Imp. Sci., Vol. XIII. 1909. Del Guercio— Redia, Vol. 9, p. 286. 1910. Wilson— Ent. News, Vol. XXI, p. 147. 1911. Wilson— Ann. Ent. Soc. Am., Vol. IV, p. 54. 1919. Wilson— Can. Ent., Vol. LI, p. 18. NEW COLEOPTERA. VIII. BY H. C. FALL, TYNGSBORO, MASS. The receipt of a very distinct new species of Ochthebius from California which it is desirable to make known, affords the opportunity for recording one or two errors in the literature of this genus. Descriptions of a few other new species are added. All types are in the author's collection. Ochthebius martini, sp. nov. Form very broad, aeneo-piceous, side margins of elytra explanate through-out and paler in colour. Labrum deeply triangularly emarginate. Prothorax one-third wider than long, widest at anterior third, sides arcuate in basal half, then suddenly deeply sinuate, nearly as in rectus (See Horn's figure), transparent border extending from apex to base, becoming very narrow in front of the middle, the sides strongly obliquely convergent from the point of maximum width, feebly arcuate to nearly straight basally; median line deep and entire; discal fovecC rather small and not very conspicuous, well separated, the posterior narrow and about twice the length of the anterior; lateral impressions deep and subparallel sided ; surface rather densely, coarsely, evenly punctate, distinctly alutaceous throughout between the punctures. Elytra not more than one-August, 1019
BioStor
