[1] M. incisus occurs in moist to wet forest habitats, from sea level to 1000 m elevation.

[3] Material from Central America and Venezuela is very similar in color and mandibular dentition.

A collection from Colombia is distinctive, with the color lighter red brown and the basal teeth of the mandible of more uniform size.

Other size and shape characters, including the highly distinctive petiole, are the same as other M. incisus.

It is moderately abundant in Winkler samples from Guatemala and southern Mexico, occurs in Panama and Venezuela, yet has never been collected in Costa Rica, in spite of extensive survey work there.