To the knowledge of Oriental leaf beetles (Coleoptera: Chrysomelidae) Author Medvedev, L. N. text Russian Entomological Journal 2019 2019-09-30 28 3 282 285 http://dx.doi.org/10.15298/rusentj.28.3.07 journal article 10.15298/rusentj.28.3.07 0132-8069 13164517 Abirus balyi Medvedev , sp.n. Fig. 3 . MATERIAL. Holotype , ♂ : Borneo ( BMNH ). DESCRIPTION. Greenish-blue, antennae blackish-blue. Body elongate, 1.8 times as long as wide. Head shining, sparsely punctate. Proportions of segments are as 13-4-11-8-9- 10-16, next segments absent, segment 7 moderately widened to apex. Prothorax 1.1 times as wide as long, shining, densely punctate, interspaces flat, mostly smaller than size of punctures. Scutellum shining, with a few microscopic punctures, broadly rounded on apex. Elytra 1.3 times as long as wide, densely punctate, with interspaces convex and mostly transverse. Segment 1 of anterior and mid tarsi feebly widened. Aedeagus with triangular apex and preapical impression on underside ( Fig. 3 ). Length 5.4 mm . DIAGNOSIS. Very alike at A. apicalis Baly, 1867 , both species might be divided as follow: 1(2) 2 or 3 apical antennal segments fulvous. Elytra of male 1.5-1.6 times as long as wide. Aedeagus with long acute spine on apex without preapical impression on underside ( Fig. 4 ) ....................................... A. apicalis Baly, 1867 2(1) Antennae entirely black. Elytra of male 1.3 times as long as wide. Aedeagus with triangular apex and preapical impression on underside ( Fig. 3 ) ............ A. balyi sp.n.