Very closely allied to, and strongly resembling P. bipunctatus Dalm., but at once distinguished from that species by the antennae being annulated with grey and black. Length 32 mm. — Black; covered with a short olivebrown pubescence which is slightly darker on the elytra; the latter have each a small glabrous spot just behind the middle and are speckled with fulvous; the head is variegated on the mandibles, face, cheeks and vertex with small spots of a coarse fulvous pubescence which likewise covers the scutellum except a glabrous stripe at the middle of its base; the antennae are covered with a dense grey pubescence, the 3rd and following joints ringed with black at the apex.