Color and vestiture: Head and pronotum dark brown, vestiture of white
setae, scutellum dark brown, often densely covered with white setae,
elytra golden brown, mottled, often with scattered white setae, ventral
surface dark to light brown.
Head: Clypeus coplaner with frons, with anterior angles acute; labrum
not coplaner with clypeus, prelabrum visible (M.
biguttatus); labium
with prementum quadrate, medially grooved; antennae 8-9-segmented, club
thin, antennal insertions not visible in dorsal view.
Prothorax: Pronotum chordate or trapezoidal, widest medially, posterior
angle acute, posterior margin straight, medially concave or weakly tridentate;
coxa transverse; tibia bidentate; pretarsus with claws weakly divergent,
equal in length, both claws narrowly split.
Mesothorax: Scutellum broadly triangular or chordate; elytra longer
than wide, widest medially, lacking striae, anterior and posterior umbones
prominent.
Metathorax: Metathoracic leg with coxa widely separated; femur ovate,
narrowing distally; tibia clavate, widest medially, narrowing in distal
1/4th, widening at distal margin, posteroventral distal margin with two
large spurs, spurs above tarsal articulation joint, posterior distal
margin with deep, broad U-shaped groove; pretarsus with claws similar
to prothoracic and mesothoracic claws.
Abdomen: Ventrites 2-4 subequal in length, 5th visible ventrite (=propygidium)
length equal to the length of ventrites 3-4 combined, 6th ventrite equal
in length to 5th ventrite length, posterior margin with a slight membranous
margin, ventrite and sternite of 5th abdominal segment lacking a complete
suture; pygidium tear-shaped, longer than wide, narrowing posteriorly,
posterior margin blunt.
