Lasinus spinosus Sharp 1874

Body (Fig. 2) unicoloured, reddish-brown, maxillary palpi yellow, length 2.90–3.10 mm. Head elongate, about 1.15 times longer than wide, slightly longer than pronotum; median sulcus visible on rostrum and on vertex reaching level of vertexal foveae. Genae with weak protuberance, covered with erected, dense golden setae. Antennae about 2.02 mm long (Fig. 11); scapes long, about 3.7 times longer than pedicels; pedicels about 1.18 times shorter than antennomeres III; antennomeres IV and V as long as wide; antennomeres VI 1.22 times shorter than pedicels; antennomeres VII 1.25 times shorter than VI; antennomeres VIII about 1.27 times longer than and distinctly wider than VII; IX about 1.5 times longer than wide and about same length as terminal antennomeres, IX in male with small and shallow discoidal plate on apical half bearing small pore-like structure with one long seta, in female unmodified; antennomeres X quadrate, 1.5 times shorter than IX; terminal antennomeres 1.6 times longer than X and about 1.5 times longer than wide. Pronotum about as wide as long, wrinkly, evenly rounded before lateral foveae; lateral and median setose foveae well-defined; median longitudinal sulcus very thin, but distinct. Legs long and slender; protrochanters with large apical spine; profemora with long spine in middle of its length; mesotrochanters at apex with one small (male) or two (female) spines, in some cases one spine is slightly stronger; mesofemora with minuscule spine at basal third. Abdomen slightly wider than elytra, first visible abdominal tergite (IV) finely punctate with dense and short golden setae, about 4 times as long as next tergite, basal carinae very short, distance between carinae 0.4 of maximal tergal width. Aedeagus (Fig. 20) 0.64 mm long; median lobe weakly narrowed apically, with short and large apical lobe; endophallus with two spines and one lamella; dorsal spine very big, enlarged at apex, forming large plate; ventral spine long, acute at apex; lamella small finely dentate in apical part; parameres short and slender, not overlapping apical lobe.

Japan (Kyushu).