Micrencaustes (Mimencaustes) biomaculata, Meng, Zhao-Na, Ren, Guo-Dong & Li, Jing, 2014

Meng, Zhao-Na, Ren, Guo-Dong & Li, Jing, 2014, Two new species of Micrencaustes Crotch, subgenus Mimencaustes Heller from China (Coleoptera, Erotylidae, Encaustini), ZooKeys 391, pp. 55-64 : 59-62

Micrencaustes (Mimencaustes) biomaculata sp. n.

Type material.

Holotype. male, CHINA: Yunnan Province, Eryuan County, 26.1111°N, 99.9510°E, alt. 1870 m, 17 August 2008, Ji-Shan Xu leg. (MHU). Paratypes. 3 males, 6 females, same data as holotype (MHU).

Description.

Body (Fig. 12) oblong oval, moderately convex, length: 10.8-12.5 mm, width: 3.5-4.4 mm; general color dark, moderately shining. Each elytron with 2 orange bands; anterior band reaching lateral and basal margins, leaving a black part at humerus, with 2 black spots near anterior border, with 4 teeth at posterior border; posterior band at four fifths length of elytron, extending from the striae I to near the lateral border, with 2 teeth at anterior border, with 3 teeth at posterior border.

Head (Fig. 13) sparsely punctured on vertex, closely at base, with ocular lines. Clypeus strongly and closely punctured, with anterior border feebly emarginate, with a fovea on each side of the base. Eyes large, rather prominent laterally. Antennae (Fig. 14) reaching basal 0.25 of pronotum; antennomere III about 1.69 times as long as IV; antennomere IX asymmetrical, almost triangular; antennomere X crescent-shaped; antennomere XI hemispherical, narrower than antennomere X, slightly constricted in middle; relative lengths of antennomeres II–XI: 12: 27: 16: 16: 17: 16: 14: 18: 13: 20. Maxillary palp terminal segment broadly triangular, nearly 3.2 times as wide as long. Mentum (Fig. 15) with plate triangular, sides concave, with rather coarse punctures and setae; submentum roughly punctured, with short golden setae.

Pronotum (Fig. 16) widest at middle (pl/pw = 0.67-0.72); sides almost parallel on posterior half and narrowing toward apex, strongly margined; anterior margin straight in the middle, margined behind eyes; basal margin weakly sinuate. Pronotum finely and sparsely punctuated, with a group of coarse punctures on each side of base area, with punctate longitudinal median areas. Anterior angles projected; posterior angles nearly rectangular.

Prosternum (Fig. 17) coarsely and sparsely punctured on lateral areas, with some oblique rugae; an irregular depression in the middle of base area; surface with golden pubescence. Prosternal process triangular, strongly emarginated at apical border, produced into a blunt point at the base. Prosternal femoral lines converging anteriorly and reaching the front edge of coxae.

Scutellum nearly pentagonal, sparely punctured.

Elytra widest at base, sides almost parallel at two thirds from base, then gradually narrowing to apex; strial punctures fine at basal part and disappeared before extremity; intervals finely punctured and distinctly wrinkled.

Mesoventrite (Fig. 18) broad, with a median pentagonal depression; mesocoxal lines moderate length; sparsely punctured.

Mesotibia (Fig. 19) with outer edge of apex acutely toothed.

Male genitalia (Fig. 20) with median lobe curved; narrowed to a hook at apex in lateral view; median strut about 1.43 times as long as median lobe.

Female genitalia (Fig. 21) with narrow styli at apex of coxite, and styli rounded apically, covered with setae at apex. Female spermatheca as in Fig. 22.

Distribution.

Known only from the type locality (China: Yunnan Province, Eryuan County).

Diagnosis.

The new species is most similar to Micrencaustes (Mimencaustes) michioi Osawa & Chûjô, 1990, but can be distinguished from it by body moderately shining; pronotum with anterior margin margined behind eyes, without impunctate longitudinal median areas; mesotibia with outer edge of apex acutely toothed. In Micrencaustes (Mimencaustes) michioi , the body fairly shining; pronotum with anterior margin immarginate, with impunctate longitudinal median areas; every tibia with outer edge of apex acutely toothed.

Etymology.

The species is named with 2 black spots near anterior border of basal mark of elytron.