Mesothen roseifemur Draudt, 1915

Draudt, M. (1915). Mesothen. In: Seitz, A. (ed.), The Macrolepidoptera of
the World, vol. 6, The American Bombyces and Sphinges: p. 66, pl. 12 k.
(German edition: Die Gross-Schmetterlinge der Erde 6: 66.)

Original description (English edition, p. 66):

M. roseifemur spec. nov. (12 k) 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.

"The preceding species" is caeruleicorpus, which Draudt describes thus
(p. 66):

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.

Draudt adds in the Additions and Corrections (p. 200):

P. 66, line 24 from below, to roseifemur add: it may perhaps be merely a
form of caeruleicorpus; in this species the extent of the red colour on
the legs is apparently most variable.