Diuncus javanus (Eggers 1923) comb. n.

Previous genus: Xyleborus

Diagnosis: Very shallow impression on declivity just above the teeth. Two pairs of minute denticles on the uppermost area of declivity. Body color yellow to light brown.

Previously synonymized species: Xyleborus perdix Schedl

Examined material: Indonesia, Java, (lectotype of Xyleborus javanus Eggers, USNM); Malaysia, Selangor, (holotype of Xyleborus perdix, BMNH); Malaysia, Malay peninsula (2, BMNH).