Measurements: Prothorax at widest point 3.0-4.0 mm, elytra at widest
point 3.6-5.6 mm, length 8.0-14.0 mm.
Color and vestiture: Head and abdomen black, thorax reddish-orange in
males of D. collaris, black in D. variabilis males, black in all known
females, covered with vestiture of short, yellowish-orange setae in all
species; elytra black, reddish-orange in females of D.
in D. collaris.
Head: Cypeus coplaner with frons, frons angled at 30°; labrum in
frontal profile narrowly ovate, weakly emarginate, slightly produced
anteriorly from clypeus, labrum not coplaner with clypeus; labium with
prementum elongate, ventral surface with medial groove; antennae 9-segmented,
segments 7-9 forming the elongate club, equal to length of segments 2-6
Prothorax: Pronotum oblong, transverse, widest medially, posterior angle
obtuse, posterior margin convex; prothoracic leg with coxae elongate;
tibia lacking teeth, medially with a stout spur; pretarsus with claws
strongly divergent, equal in length, both claws narrowly split.
Mesothorax: Scutellum subtriangular; elytra ovate, width equal to length,
elytral epipleuron forming a rounded bead, margin with a slight membranous
border, dorsal surface punctate, punctures in distinct vertical lines,
anterior umbone prominent, posterior umbone moderately produced; pretarsus
of mesothoracic leg with claws equal, divergent, simple.
Metathorax: Metathoracic leg with coxae clearly separated; femur broadly
ovate, widest medially; tibia subtriangular, widest medially, narrow
proximally, posteroventral margin with a pair of long, stout spurs; pretarsus
with claws similar to mesothoracic legs.
Abdomen: Ventrites 2-4 subequal in length, 5th visible ventrite (=propygidium)
equal in length to ventrites 2-4 combined, ventrite and sternite of 5th
abdominal segment lacking a complete suture, 6th ventrite equal in length
to 5th ventrite length; ventromedial surface with a semicircular shaped
pocket, margins of which are raised; pygidium subtriangular, width equal
to length, posterior margin blunt.