Typical cerambycid shape, 25 mm (male) and 35 mm (female) – the elytra of females is parallel whereas the elytra of males is distally tapered; antennae 1.7-2 times body length in males and 1.2 times body length in females. Beetle has several irregular white spots on the elytra; antennae have 11 segments, each with a white blue base; Females are larger than males; both are glossy black (after emergence from the tree will be very blue-black) and finely punctate.
The other species which A. chinensis may be confused with is A. glabripennis. The two species can be separated as follows:
Pronotum: A. chinensis (morph from Japan) has two bluish-white hair spots on either side of the pronotum; pronotum in A. glabripennis and A. chinensis (morph from China) black and without hairspots.
Elytra: A. chinensis has numerous tubercles at the base of the elytra while the base of the elytra in A. glabripennis is smooth.
Scutellum: A. glabripennis and A. chinensis (morph from China) is black, A. chinensis (morph from Japan) has a white hair patch.
Source:
EPPO Data sheet & Cornell University Info Sheet
