Diuncus javanus (Eggers, 1923) Fig. 50A, B, I

Xyleborus javanus Eggers, 1923: 188.

Diuncus javanus (Eggers): Hulcr and Cognato 2009: 32.

Xyleborus perdix Schedl, 1939a: 351. Synonymy: Schedl 1960b: 109.

Type material.

Lectotype Xyleborus javanus (NMNH).

Diagnosis.

2.5-2.7 mm long (mean = 2.62 mm; n = 5); 2.08-2.25 × as long as wide. This species is distinguished by the elytral summit transversely impressed with a saddle-like depression; declivital base armed by two pairs of denticles, one pair on interstriae 2 and the other on interstriae 3; bicolored elytra and pronotum that are darker on the apical areas; declivital interstrial setae recumbent, thick, scale-like, in uniseriate rows; and striae glabrous.

Similar species.

Diuncus corpulentus, D. dossuarius .

Distribution.

Brunei, Indonesia (Java, Sumatra, Sulawesi), East & West Malaysia, Philippines, Thailand.

Host plants.

Polyphagous (Kalshoven 1959b; Browne 1961a).