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Head: wider than long; vertex sulcate or micropunctate; frontal
carina feebly developed, elongate or diamond-shaped, extending
between antennae and joins clypeal base; clypeus large and usually
longer than broad, triangularly elevated, apex feebly arcuate,
surface finely punctate or coarsely granularly tuberculate with
long white hairs. Antennae: segment I incrassate. Pronotum:
transverse; side margins obtusely angulo-subroundate at
middle; dorsum transversely convex, slightly depressed posteriorly
with ante-scutellar transverse ridge. Elytra: subelongate,
parallel, slightly constricted at sides; apices regularly rounded
and finely serrulate; each elytron with 10 rows of punctures at
base and apex. Venter: sparsely, irregularly micropunctate;
5th abdominal sternum apically truncate. Male genitalia: aedeagus
moderately sclerotized; basal foramen small, slightly larger than
1/16th length of aedeagus, antrodorsal wall of foramen small,
slightly to strongly convex; medial lobe tapering distally to
acute or subacute point; apical orifice small, U-shaped;
apical hood varies in shape; strut keeled dorsally; flagellum
stout, usually broad at base and narrowing towards apex, its basal
end away from foramen; spiculum varies in shape.
Page authors:
C. L. Staines, 3302 Decker Place, Edgewater MD 21037. Staines.Charles@NMNH.SI.EDU
John T. Longino, The Evergreen State College, Olympia WA 98505 USA. longinoj@evergreen.edu