"m. scutellaris" workers of populations from different elevations show morphological differences. workers from coastal colonies have a dark thorax, while workers from mountainous regions have a light thorax, both having five white stripes and grey hairs. this variation is associated with the humidity in those areas which influences the pigmentation. its body is robust, the clypeus is slightly convex, and the face is relatively narrow. they are about 10 to 12 mm in length.