. Classification of the Coleoptera of North America [microform]. Beetles; Beetles; Coléoptères; Coléoptères. m 100 COLEOI'TERA OF NORTH AMKRICA. authors seem, from the form of tlie body unci difTorcnoc in posi- tion of the antenna), almost outilled to rank as distinct genera. Body pubescent; antenna) very approximate, or Komewhat distant. Atomaria. Body ovate, convex, glabrous ; antenna- somewhat distant. Ei'isteml' :,tf ' :â â 'â ., ri^.r;u^/ â â â â . Fam. XXII.âDERODONTIDAE. Mentum small, trapezoidal; ligula corneous, with distinct paraglossoe; labial palpi 3-jointed, with the last j
. Classification of the Coleoptera of North America [microform]. Beetles; Beetles; Coléoptères; Coléoptères. m 100 COLEOI'TERA OF NORTH AMKRICA. authors seem, from the form of tlie body unci difTorcnoc in posi- tion of the antenna), almost outilled to rank as distinct genera. Body pubescent; antenna) very approximate, or Komewhat distant. Atomaria. Body ovate, convex, glabrous ; antenna- somewhat distant. Ei'isteml' :,tf ' :â â 'â ., ri^.r;u^/ â â â â . Fam. XXII.âDERODONTIDAE. Mentum small, trapezoidal; ligula corneous, with distinct paraglossoe; labial palpi 3-jointed, with the last joint oval. Maxilla) exposed at the base; inner lobe corneous, hooked at the end, and ciliate near the tip; outer lobe equal in size, ciliate at tip; maxillary palpi 4-joiDted, cylindrical, last joint elongate oval. Head suddenly but not strongly constricted behind; eyes small, rounded, prominent, finely granulated; labruin trans- verse, rounded, separated from the front by a transverse membranous epistoma; mandibles short, curved, acute, with a tooth very near the apex. Antennas inserted before the eyes, upon the sides of the front, 11 jointed, first and second joints thicker than the fol- lowing, 9â11 not suddenly larger. Prothorax with the side pieces not separate, the margin strongly toothed; coxal cavities confluent, closed l)ehind. Mesosternum short, scarcely separating the middle coxae; side pieces diagonally divided. Metasteruum large, side pieces narrow. Elytra entirely covering the abdomen, with ten rows of large quadrate punctures, besides a marginal series and a short one near the scutellum. Abdomen with five free equal ventral segments. Coxa3, anterior, transverse, conical, prominent, contiguous; middle, oval, oblique, slightly prominent; posterior, trans- Verse, slightly separated, dilated internally, forming a small plate, which protects the insertion of the thigh. Legs moderate; tibiae not dilated, with small terminal spurs; tarsi 5-jointed, clot
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