Monochamus notatus

Taxonomic history

Cerambyx notatus Drury, 1773: 77

Diagnosis - adult

Length: 23–35mm.
Elytral length:width ratio: length > 2x width.
Face: shape wide rectangle; genagena:
the part of the cranium on each side below the eye
length longer than lower eye lobelobe:
a rounded projection or protuberence
or subequal to lower eye lobelobe:
a rounded projection or protuberence
.
Pronotum: dense setaeseta:
a sclerotized hair-like projection of the cuticle
on dorsum of lateral spines present; maculaemacula:
a spot or mark
on pronotal disk: 2–4 dots present or absent; posteromedial tubercletubercle:
a small knoblike or rounded protuberance
absent; lateral erect setae:seta:
a sclerotized hair-like projection of the cuticle
:: only present posterior to spinespine:
a protuberance with an acute (sharp) distal end
.
Scutellum: pubescence broken at least partially along midline.
Elytra: Elytra:Elytron:
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
:l integument color orange to red; Elytra:Elytron:
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
:l maculae:macula:
a spot or mark
:: pubescence forming narrow longitudinal lines; Elytra:Elytron:
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
:l sutural apexapex:
end of any structure distad to the base
rounded; elevation in basal third followed by impression absent; basal granulation nearly absent; middle to apical punctationpunctation:
pits or depression of variable size in cuticle
fine.
Antennal length (female): >1–2 segments beyond or 2–3.5 segments beyond Elytra:Elytron:
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
:l apexapex:
end of any structure distad to the base
.
Aedeagus: paramereparamere:
A pair of finger-like structures that are located where the male genitalia exits the abdomen.
mediobasal tooth present; apical tip (ventral view) slightly rounded; scleritesclerite:
any hardened plate of the body wall bounded by membrane or sutures; sometimes found floating in the internal sac of male genitalia
in internal sac: scleritesclerite:
any hardened plate of the body wall bounded by membrane or sutures; sometimes found floating in the internal sac of male genitalia
absent.

Male. Form large, tapering posteriorly, integument reddish-piceous, 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
and outer antennal segments usually dark reddish-brown; pubescence recumbent, mostly grayish with small brown patches sparsely interspersed on 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
. Head with front convex, shallowly, irregularly punctatepunctate:
set with fine, impressed points or punctures appearing as pin-pricks
, irregularly clothed with white recumbent pubescence; genaegena:
the part of the cranium on each side below the eye
longer than lower eye lobelobe:
a rounded projection or protuberence
, parallel; 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
extending about six segments beyond 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
, segments minutely asperate, segments three to nine with apical sensory areas, scapescape:
the first proximal segment of the antenna
rather densely pubescentpubescent:
downy; clothed with soft, short, fine, loosely set hair
, remaining segments rather sparsely clothed with very short recumbent pubescence, eleventh segment arcuatearcuate:
arched or bow-like
. Pronotumpronotum:
the upper and dorsal part of the prothorax
as long as broad, lateral tubercles prominent, rounded at apices; apexapex:
end of any structure distad to the base
and basebase:
the part of any appendage or structure that is nearest the body
broadly impressed; disk with a median callus and a broad swelling on each side; punctures fine, irregular, sparse around median callus, remainder almost impunctate; pubescence whitish, irregular, recumbent, denser around lateral tubercles; prosternum ruguloserugulose:
minutely rugose; minutely wrinkled
, rather densely pubescentpubescent:
downy; clothed with soft, short, fine, loosely set hair
; meso- and metasternum irregularly punctatepunctate:
set with fine, impressed points or punctures appearing as pin-pricks
at sides, densely, nonuniformly pubescentpubescent:
downy; clothed with soft, short, fine, loosely set hair
, long, suberect hairs numerous. 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
less than 2.5 times as long as broad; basebase:
the part of any appendage or structure that is nearest the body
with scattered, small, rounded asperites, denser on humeri; punctures behind small, rather sparse, becoming obsolete toward apexapex:
end of any structure distad to the base
; pubescence recumbent, mostly gray, mottled, with a few small patches of brown interspersed; apicesapex:
end of any structure distad to the base
rounded, vaguely angulate at sutures. Scutellumscutellum:
a small sclerite located directly posterior to the pronotum, bordered laterally by the elytra
broader than long, white pubescentpubescent:
downy; clothed with soft, short, fine, loosely set hair
except for median line, rounded at apexapex:
end of any structure distad to the base
. Legs irregularly white pubescentpubescent:
downy; clothed with soft, short, fine, loosely set hair
; femora with a few, short golden hairs interspersed. Abdomen densely, irregularly pubescentpubescent:
downy; clothed with soft, short, fine, loosely set hair
, finely punctatepunctate:
set with fine, impressed points or punctures appearing as pin-pricks
; last sternite subtruncatesubtruncate:
not quite cut off squarely at the tip
at apexapex:
end of any structure distad to the base
, often shallowly emarginateemarginate:
notched at the margin
at middle, sides with a few long, erect hairs. Length, 23–35 mm.

Female. Form more robust, parallel. Head with front flat, broad, genaegena:
the part of the cranium on each side below the eye
divergentdivergent:
spreading out from a common base
; antennal tubercles much less prominent, more divergentdivergent:
spreading out from a common base
; 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
extending about two segments beyond 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
. Abdomen with last sternite emarginateemarginate:
notched at the margin
at apexapex:
end of any structure distad to the base
, each side with large tufts of black hairs. Length, 24–35 mm. (Chemsak 1984)

Similar species

M. carolinensis

Differential diagnosis

The grayish color, mostly white pronotumpronotum:
the upper and dorsal part of the prothorax
, usual large size, large female face, and unarmed sutural apexapex:
end of any structure distad to the base
will distinguish this species.

Distribution

eastern to northwestern USA, southern Canada

Recorded host plants

Pinus spp., Picea, Abies

Synonyms

Lamia varia Frölich, 1792: 144

Monochamus confusor Kirby, 1837: 168

Monochammus peregrinus Gradl, 1881: 301

Monochamus notatus morgani Hopping, 1945: 17