Lemula Bates, 1884

Ohbayashi, Nobuo & Chou, Wen-I, 2019, Revision of the genus Lemula (Coleoptera, Cerambycidae, Lepturinae), Zootaxa 4671 (4), pp. 451-499 : 454

Genus Lemula Bates, 1884

Lemula Bates, 1884: 211 . Type species: Lemula decipiens Bates, 1884 (by monotypy).—Aurivillius, 1912: 168.—Tamanuki, 1939: 93.— Hayashi, 1944: 22.—N. Ohbayashi, 2007: 361.

Diagnosis. Body small, length between ca 5–9 mm. Head widest across eyes; tempora gradually narrowed from some distance behind eyes to neck; gena very short, less than half of eye diameter; eyes entire, not reniform. Antennae inserted near anterior margin of eyes, not reaching elytral apices in both sexes; scape rather thick, usually longer than antennomere III, and nearly as long as V.

Pronotum with a pair of blunt lateral tubercles; disk moderately convex with distinct or indistinct median longitudinal impression. Prosternal intercoxal process narrow and short, rarely reaching middle of coxae; acetabula of procoxae broadly open posteriorly. Mesosternal process narrow, parallel-sided in apical half. Stridulatory files of mesonotum symmetrically divided. Scutellum usually lingulate.

Elytra sub-evenly convex in lateral view, ca 1.8 to 2.2 times as long as humeral width, parallel-sided in male, slightly dilated apically in female with obtusely rounded outer angles. Elytral pubescence consists of uniform slant- ed hairs, or intermixed different type of erect and slanted hairs. Legs moderate in length; femora slightly clavate; tibiae linear, slightly broadened apically; metatarsi not remarkably elongate; first tarsomere as, or slightly longer than second and third combined.

Inflated endophallus basically similar in structure among species, but some specific characters can be recognized in proportions, structure of dorsal sclerites (ds) and dorsal macula (dm) situated at central trunk (CT). Proportions of endophallus are separable into three major types ( Fig. I ) as follows: type A = preapical bulb ( PB) is tube-like structure without inflation ; type B = central trunk (CT) and preapical bulb ( PB) are clearly separable by preapical constriction (pc) ; type C = central trunk (CT) and preapical bulb ( PB) are unified and strongly curved dorsally in lateral view .

Remarks. The genus Lemula can be separable from other genera of the tribe Rhagiini by small body size, entire eyes, laterally tuberculate pronotum or setigerous punctures on the elytra.

Figures

FIGURE I. Terms of endophallus [Type A = Lemula (s. str.) cyanipennis (G-1050); Type B = L (s. str.) testaceipennis (G-1003); Type C = L. (s. str.) formosana (G-1070)]—Left: dorsal aspect; right: lateral aspect.—BPH: basal phallomere; MPH: medial phallomere (MT+CT+PB); APH: apical phallomere.—MT: medial tube; CT: central trunk; PB: preapical bulb.—cs: crescent shaped sclerites; ds: dorsal sclerites; dm: dorsal macula; lrs: lateral ridges; pc: preapical constriction; ac: apical constriction; ed: ejaculatory duct.