. Classification of the Coleoptera of North America [microform]. Beetles; Beetles; Coléoptères; Coléoptères. niSTERIDAE. 77 Prostornnl lolio very prnminniit; Anterior tiliiir witli nn internal tooth n«ar the baao. Anterior tiltiii' without nuy Internal tootli. Prostcrrial loU- narrow, not vory promini-nt. Omalodkb. Anterior f ihini with the tarnal fjrooVH liailly ileflneil, straight; Midille and poxturior tiliiiv with a Hin^'lo range ofHpinett. Middlu and posterior til)iaB with two ran^^eH of Hpinex. Hihtkb. The student who will consult my paper above
. Classification of the Coleoptera of North America [microform]. Beetles; Beetles; Coléoptères; Coléoptères. niSTERIDAE. 77 Prostornnl lolio very prnminniit; Anterior tiliiir witli nn internal tooth n«ar the baao. Anterior tiltiii' without nuy Internal tootli. Prostcrrial loU- narrow, not vory promini-nt. Omalodkb. Anterior f ihini with the tarnal fjrooVH liailly ileflneil, straight; Midille and poxturior tiliiiv with a Hin^'lo range ofHpinett. Middlu and posterior til)iaB with two ran^^eH of Hpinex. Hihtkb. The student who will consult my paper above cited will sco that there are good reasons for regarding the characters here given as not of generic value. The genus I'aronialus, aa above defined, is divided by Marseul into two:â Elytra striate; l»ody oval, sulKionrcx. Elytra not Htriatu ; body oblong, HulxleprenHed. CaBOISOI'S. PAKOMALI'S. But these divisions are not adopted by Lacordaire and Duval. Snb-Tribe 2.âgaprfni. Some of the genera of this sub-tribe live under bark and in excrements, also under stones; but the numerous species of Sa- prinus arc found mostly in carcasses. Our genera are the following:â Antenna) inserted under tlio margin of the front; antennal cavities at tlie sides of tlie prosteniuui proper. Sai'him's. Antenna} inserted on the front; antennal cavities at the sides of the under surface of the prothorax; Body cylindrical; tibiae toothed. Tekkthius. Body oblong; thorax with a deep groove each side; tibim not toothed. Pleoaoguus. Body round; posterior tarsi 4-jointed; tibiie not toothed. Acuitch. The species of the last genus are the most minute of the family, and are quite numerous in North America. The European species, formerly enrolled in Saprinus, S. rotund- atus and piceus, were found by Duval to have the inner lobe terminated by a corneous hook, and were therefore placed as a distinct genus, Gnathoncus; to the same genus belong .S. deletus Lee, identical with the European rohinda
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