Pachytricha demarzi is a species of beetle of the family Scarabaeidae.BioLib It is found in Australia (Western Australia).
Description Adults reach a length of about . The upper and lower surfaces are blackish-brown and moderately glossy. The upper surface is smooth, while the underside is densely whitish-haired, but the ventral segments are only sparsely haired. The antennae are brown and the legs are blackish-brown.
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