Lemula (s. str.) formosana, Ohbayashi & Chou, 2019

Ohbayashi, Nobuo & Chou, Wen-I, 2019, Revision of the genus Lemula (Coleoptera, Cerambycidae, Lepturinae), Zootaxa 4671 (4), pp. 451-499 : 472-474

Lemula (s. str.) formosana sp. nov.

Description. Male: Head and pronotum greenish black to blue green. Antennae with scape bronzy green, antennomeres II–V shiny black, VI–XI dull black. Pronotum and scutellum greenish black with bronzy tints. Elytral color variable as green, golden green, bronzy or blue green of metallic tint. Ventral surface with meso-and metasterna metallic greenish black to blue green; abdominal ventrites entirely orange yellow, or I or I–II decorated with dark brown patches near lateral base. Legs black with bronzy tint on femora; tarsal claws reddish on apical halves. Head with clypeus and labrum with long feeble pale hairs; vertex to occiput with short golden hairs. Pronotum sparsely furnished with flying short pale hairs. Elytra moderately furnished with slanted pale whitish hairs. Legs rather densely furnished with sub-recumbent pale bristles.

Head very sparsely and irregularly punctured; antennae exceeding middle of elytra.

Pronotum almost as long as width at lateral tubercles (PL/PW = 1.00), with a small rounded tubercle at middle of each side; disk rather weakly inflated on both sides of indistinct median longitudinal depression, very sparsely punctured. Scutellum nearly semicircular.

Elytra shorter than twice humeral width (EL/EW = 1.92), slightly narrowed just behind humeri, then slightly widened posteriorly to broadly rounded apices; disc moderately punctured, space between punctures wider than punctures themselves, punctures becoming finer and sparser to apex. Ventral surface with mesosternum finely punctured and rugose, and distinctly so on metasternum; abdomen finely punctured.

Female: Similar to male, but antennae short, not reaching middle of elytra; elytra slightly widened from humeri to apical fourth.

Etymology. Species name is derived from the old name of Taiwan.

Remarks. This new species is similar to the Chinese L. coerulea in general appearance or the structure of endophallus, but it can be distinguished by shallow pronotal median depression, coarser elytral punctures, the different color of elytral hairs which are pale yellowish white instead of dark brown. Also the elytral color is variable from blue, bronzy or green with metallic tint, instead of metallic blue green.

This species is separable into following two subspecies.