Poliaenus

Subfamily

Lamiinae

Diagnosis - adult

Body length: 6–11mm.
Eyes: eye interommatidial setaeseta:
a sclerotized hair-like projection of the cuticle
absent, eye deeply emarginateemarginate:
notched at the margin
> half width, eye ommatidial density coarse.
AntennaeAntenna:
in larval and adult insects, paired segmented appendages, borne one on each side of the head, functioning as sense organs and bearing a large number of sensilla
: antennal length reaching/surpassing end of body, antennal flagellar segments elongateelongate:
much longer than wide
, scapescape:
the first proximal segment of the antenna
smooth/punctate at apexapex:
end of any structure distad to the base
, antennal segment 3 > scapescape:
the first proximal segment of the antenna
.
Pronotumpronotum:
the upper and dorsal part of the prothorax
: pronotumpronotum:
the upper and dorsal part of the prothorax
shape transversetransverse:
broader than long
or subquadratesubquadrate:
not quite a square
, pronotumpronotum:
the upper and dorsal part of the prothorax
lateral armature blunt tubercule.
Prosternum: prosternal process dilated at apexapex:
end of any structure distad to the base
, procoxal cavities closed posteriorly.
ElytraElytron:
the leathery forewing of beetles, serving as a covering for the hind wings, commonly meeting opposite elytron in a straight line down the middle of the dorsum in repose
: elytral length reaching or close to end of abdomen, elytral apicesapex:
end of any structure distad to the base
rounded or truncatetruncate:
cut off squarely at the tip
, elytral color pattern present.
Legs: visible tarsomeres: 4, femora clavateclavate:
thickening gradually toward the tip
, protibial spurs: 2, tarsal claws simple.

Body moderately elongateelongate:
much longer than wide
, subcylindrical, clothed with short, dense appressed pubescence, intermixed with long flying hairs. Head broad, longitudinally sulcate between the antennae; eyes deeply emarginateemarginate:
notched at the margin
, lower lobelobe:
a rounded projection or protuberence
subquadrate; antennaeantenna:
in larval and adult insects, paired segmented appendages, borne one on each side of the head, functioning as sense organs and bearing a large number of sensilla
usually only slightly longer than the body in the female, distinctly so in the male, usually clothed with long flying hairs, scapescape:
the first proximal segment of the antenna
elongateelongate:
much longer than wide
, slender, fourth segment not incurved, shorter than third, remaining segments shorter, diminishing in length toward apexapex:
end of any structure distad to the base
. Pronotumpronotum:
the upper and dorsal part of the prothorax
armed with both lateral and discal tubercles, the latter sometimes feeble; anterior coxal cavities rounded, narrowly angulate externally, intermediate coxal cavities closed externally. ElytraElytron:
the leathery forewing of beetles, serving as a covering for the hind wings, commonly meeting opposite elytron in a straight line down the middle of the dorsum in repose
elongateelongate:
much longer than wide
, each with a subbasal crested tubercletubercle:
a small knoblike or rounded protuberance
ante-median area transversely depressed; apicesapex:
end of any structure distad to the base
rounded or feebly truncatetruncate:
cut off squarely at the tip
, rarely obliquely truncatetruncate:
cut off squarely at the tip
. Legs short; femora clavateclavate:
thickening gradually toward the tip
; intermediate tibiaetibia:
the leg segment distal to the femur, proximal to the tarsus
with an external sinus; tarsal segments often clothed beneath with a short, dense yellow pile (Linsley and Chemsak 1984).

Similar genera

Pogonocherus

Distribution

western Nearctic south to Honduras

Recorded host plants

broadleaf; Abies, Pseudotsuga taxifolia, Pinus; Acer, Rhus, Quercus, Fremontia californica

Remarks

11 species. Extremely variable within species or host population.

Taxonomy

Poliaenus Bates, 1880, Biol. Cent-Am., Coleop., 5: 120