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Banded elm bark beetle

Scientific Name
Scolytus schevyrewi
Scientific Author
Semenov, 1902
Taxonomy
(Coleoptera: Curculionidae: Scolytinae: Scolytini)
Status
Exotic species - absent from Australia
Reliability
High
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Diagnostic Images (10)
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Diagnostic Notes
Adult body length 1.9-3.1 mm, body cylindrical, shining, with reddish-brown antennae and legs and dark brown or black body, often with reddish-brown, femorea often with over half of the length dark black with apices brown;  elytra with a dark transverse median band; apex of leytra extends well beyond end of abdomen, ventral part of abdomen steeply ascends to meet elytra; tubercle present on second abdominal sternite which is variable in shape and position but not at anterior of second sternite; no teeth on posterolateral margibs of abdominal sternites 2-4; short, recumbant setae on abdominal sternites 3-5; three rows of stout, long, discal elytral setae about 2 x longer than the width of the intervals between rows of elytral punctures.

Differences between:

Character S. multistriatus S. schevyrewi

Body length: 2-3mm 3-4mm

Declivity: Single spine Single ventral spine

on second sternite on second sternite

anteriorly posteriorly

spine elongate, spine short,

narrowed broadly concial

lateral teeth no lateral teeth

on sterna 2,3,4 on sterna 2,3,4

Gallery: Symmetrical Asymmetrical

Larval mines Larval mines

Do not cross do cross.

Sources:

See weblinks for Screening Guide.

Diagnostics: Sternum 2 with base of spine touching its anterior margin; posterolateral margins of sterna 2–4 each bearing small, distinct, sharply pointed tubercles (those on sternum 4 often obscured by elytra); median posterior margin of sternum 1 convex; elytra unicolorous brown

Found: British Columbia and Nova Scotia to California and Florida to California and Florida.

Host: Ulmus.


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