Habitus

Habitus . – Fig. 7a. Fully winged. Body length: 14.2-14.8 mm.

Colour. –All the dorsal surface smooth and shiny, piceous black, with a metallic brownish-copperish lustre on the pronotum and the elytra; femora and tibiae reddish-brown; tarsi reddish, infuscated and almost black at apex; antennae and palpi testaceous. This description of the colour pattern is based on the holotype only, as the paratype is a teneral specimen.

Microsculpture, mesh pattern. – Head: slightly transverse on the vertex, more elongate and shallowly impressed on the sides; pronotum: superficial, transverse; elytra: thin transverse meshes, becoming almost isodiametric around the punctures.

Head. – Narrow, vertex and frons convex, sides of frons shallowly wrinkled anterad the anterior susocular seta. Eyes convex, moderately protruding, twice as long as genae which are feebly divergent, not convex. Mandibles long and robust, hardly arcuate.Antennae very long and slender, as long as two thirds of the body length, antennomere 3 as long as 1+2.

Prothorax. – Pronotum trapezoidal, markedly broader at base than at apex, sides straight in distalhalf, arcuate in basal half, with broad, flat lateral margins widening toward base; anterior angles rounded, slightly protruding in the holotype, not protruding in the paratype; hind angles rounded, laterobasal impressions deeply impressed; one pair of lateral setae (anterior seta missing). Disc of the pronotum withtransverse, shallow wrinkles; basal and apical margins entirely bordered.

Elytra. – Very convex, subparallel, elongate but much broader than pronotum; humeri broadly rounded; a strong protuberance in the seventh and eighth interval at 2/3 of the elytra length; subapical sinuation deep; apex prolonged into a long, acute and slightly arcuate spine in the extension of the third interval ( Fig. 7b). Striae nearly foveate, discontinuous, impunctate, alternating deep dashes, 0.1-0.3 mm long, with smooth interruptions, 0.2-0.4 mm long; intervals flat; third interval with 3 setae, the first one at 1/5 of elytra length, the second one at 2/3, the third one near apex. Umbilicate series comprising 16 setiferous punctures.

Abdomen. – Last visible abdominal ventrite with two pairs ( ♂) or five pairs ( ♀) of setae along its apical margin ( Fig. 7c).

Legs. – Long and slender; metafemora without any ventroposterior or anterior setae; dorsal face of all tarsi smooth and convex. Fourth metatarsomere: apical lobes moderately long, asymmetrical, the outer lobe less than 2 times longer than the inner lobe; subapical dorsolateral seta present on both apical lobes. Fifth tarsomeres asetose ventrally.

Male genitalia. – Teneral, not studied.

Female genitalia. – Gonocoxite 2 strongly arcuate, with 3 ensiform setae on the outer ridge ( Fig. 7d). The restof the genitalic apparatus was not studied.