Seitz:

M. caeruleicorpus Schaus. Body deep blue. Tibiae rosy red, tarsi black. Wings hyaline with black margins, veins and apical spot. Expanse of wings: 30 mm. Bolivia.

M. roseifemur spec. nov. is very nearly allied to the preceding species, differing particularly by the hips and femora being rosy red and not the tibiae, whereas the tibiae and tarsi are black-brown. The whole body is brown-black, above on the abdomen with an indigo-blue gloss. The hyaline wings have narrow black margins and large apical spots. 
Described according to 1 male from Colombia (Quindiu Pass 2100 m); type in Coll. Seitz. It may also be a form of the following species with a black collar and black shoulder-covers, the red lateral spots at the 1st abdominal segment being absent, too.