Distinguished by non-hairy, metallic, subtriangular patches on the outer part of abdominal sternites, conspicuous in lateral view. Also by the pronotum sides having a distinct 'short arcuate pre-lateral carina' extending from the latero-basal angles to before the middle, plus a marginal carina extending almost to the apex.

Only known in SA by a Tepper collection from Ardrossan on Yorke Peninsula. This was cited by Bellamy 1988 as a paratype of M. cylindricolle and labelled by him accordingly, however, it is actually M. intermedium. Although the specimen is missing its abdomen, the sides of the pronotum have the distinct pre-lateral and lateral carinae which are diagnostic for this species.