Chramesus

Type species

Chramesus hicoriae LeConte

Adapted from Wood 1982, p. 315-347

Diagnosis

Chramesus is distinctive in having a large and asymmetricalasymmetrical:
not identical on both sides of a central line
bean or kidney-shaped clubclub:
the apical segment of the insect antennae that is enlarged or thickened such that it is anatomically differentiated from the preceding segments
with no suturessutures:
a seam or seam-like line of contact between two sclerites or hardened body parts immovably connected
.

Description

The length of the species in this genus ranges from 1.2 to 2.7 mm and are approximately 1.4 to 2.3 times as long as wide. They vary in color from yellowish brown to black, with two species appearing bicolored by virtue of their setaesetae:
a hollow, often slender and hair-like cuticular projection
. The pronotumpronotum:
the upper or dorsal surface of the first thoracic segment
is wider than long. The scutellumscutellum:
a shield-like bony plate or scale, as on the thorax of some insects
is small, visible in all but one species. The crenulationscrenulations:
structures on the surface of the integument an having irregular, wavy, or serrate outline
on the anterior margin of the elytraelytra:
the two external and hardened or sclerotized forewings of adult Coleoptera, often appearing leather-like in texture
are usually well developed. The declivitydeclivity:
the apical portion of the beetle elytra that slopes downward
is convex, unarmedunarmed:
having no granules, teeth, tubercles, spines, or other protective structures
rarely bearing granulesgranules:
a small grain-like elevation
. The vestiturevestiture:
a surface covering of scales or setae on the body, wing, or other appendage
is variable; it consists of scales and/or hair-like setaehair-like setae:
setae that are thin and similar to a hair
. The anterior margin of the compound eye is entire. The scapescape:
the first and basal segment of the insect's antennae
is longer than the 5-segmented funiclefunicle:
the antennal segments located between the scape and the club in some Coleoptera
. The large, kidney-shaped clubclub:
the apical segment of the insect antennae that is enlarged or thickened such that it is anatomically differentiated from the preceding segments
is flat and asymmetricalasymmetrical:
not identical on both sides of a central line
, with no indication of suturessutures:
a seam or seam-like line of contact between two sclerites or hardened body parts immovably connected
. The procoxaeprocoxae:
extra segment occasionally preceding coxa (hip joint) of the first or anterior pair of legs of arthropods
are separated.

Distribution

Southern California to Argentina, and Eastern Canada

World fauna

Number of species: 89, Native species: 9, Introduced species: 0

Hosts

Bambusa, Carya, Cassia, Canavalia, Celtis, Condalia, Leucaena, Mimosa, Morus, Nolena, Rhamnus, Robinia, Serjania, Quercus