Mr. W. Albarda has presented to the Leyden Museum a male specimen (forma major) of an interesting Prosopocoelus-species from central Java, captured by Mr. Roldanus at Magelang (Kadoe Residency), which no doubt is still undescribed. It seems to be allied to Prosopocoelus cilipes Thoms., from Assam, a species which is unknown to me, but which is said to be likewise distinguished by its slender and elongate tarsi and by the crenulate lateral margins of its prothorax. Length without mandibles 23 mm., that of the mandibles 8 mm.; breadth at the shoulders 8 mm. — Above dark chestnut-brown, brighter on the elytra and legs, the tarsi and body underneath blackish.