Description of a new species of the genus Iliotona (Coleoptera: Histeridae) from Guatemala

DESCRIPTION.Habitus as illustrated (Fig. 1).L=10.1 mm.Black, elongate, almost parallel-sided.Pronotum opaque, elytra smooth.Legs black, club of antennae grey.Head massive, subopaque.Front flattened, with very shallow and sparse punctures, those being much coarser and denser at occipital area.Supraorbital striae well developed, reaching the anterior edge of eyes.Front with two shallow impressions around short, but distinct frontal striae.Punctures in this impressed area somewhat coarser and denser.Mandibles straight, feebly curved near apex, punctured.Basal parts of mandibles dilated, each inner edge with large, acute, transverse basal tooth and very small one proximally.Female paratype has additional median small obtuse tooth.Pronotum opaque laterally, subopaque on disk, markedly transversal, lateral sides rounded, widest near apical one-third, Wpmax=8.2 mm; Wpb=7.9 mm; Lp=4.6 mm.Median longitudinal stria fine, occupies basal two-thirds of pronotal length.Pronotal disk with punctures as on head.Marginal stria presents in anterior one-third only.Lateral pronotal sides with two striate grooves extending inwardly and anteriorly, one longer and deeper, irregularly interrupted around its midpoint, runs from basal angle, another shorter and shallower from around midpoint of lateral margin (Fig. 2).Small striate fragment presents near anterior end of basal groove.Apical pronotal angles strongly flattened, with rugose puncturation, without notches apically.Elytra smooth, as wide as pronotum at base, feebly dilated at humeri, slightly narrowing posteriorly, with sparse and fine punctures, We=8.4 mm.Humeral stria extends from humeri posteriorly, abbreviated at apex.First dorsal stria short, basal, about one-fourth of elytral length.Several irregular, short, deep striae present around anterior angles.Second dorsal stria thin, but distinct, long, slightly reduced basally, somewhat fragmented apically, ABSTRACT.The fourth species of the Central American gunes Iliotona Carnochan, 1917 from Guatemala, I. gilli sp.n., is described and illustrated.An updated key to the species of the genus is included.ÐÅÇÞÌÅ.Îïèñûâàåòñÿ ÷åòâ¸ðòûé âèä öåíòðàëüíîàìåðèêàíñêîãî ðîäà Iliotona Carnochan, 1917 èç Ãâàòåìàëû I. gilli sp.n.Ïðèâîäèòñÿ äîïîëíåííûé êëþ÷ äëÿ îïðåäåëåíèÿ âèäîâ ðîäà Iliotona.