Your are here:

rust-red flour beetle

Scientific Name
Tribolium castaneum
Scientific Author
(Herbst, 1797)
(Coleoptera: Tenebrionidae: Triboliini)
Exotic Species Establishment in Australia

Page menu options:

Diagnostic Images

Dorsal Image
Gypsum, Victoria. November 1924, C. Oke. ID. A. Neboiss,1959
Clare McLellan Museums Victoria
Image Options
Diagnostic Images (10)
Other Images (10)
Diagnostic Notes

Tribolium castaneum (rust red flour beetle):

-                    2.3 – 4.4mm in body length, flattened

-                    Is reddish-brown in colour

-                    Antennae club distinctly formed in a distinct three-segmented club

-                    Head is visible from above

-                    Pronotum sides less curved than on T. confusum, punctures on centre of pronotum smaller than punctures on lateral margins

-                     Head capsule is notched at the eyes but almost continuous with no ridge

-                    Eyes divided by a projection of the head with narrowest portion is at least 3-4 facets wide

-          Underneath view shows eyes separated by less than half the head width

-                     Ventral part of eye large, extends medially to the level of the maxillary fossa

-                    Margins of eyes not elevated

-                    Beetles do fly

-                     Males have a setiferous patch on the posterior side of the fore femur; females have no such patch

-                    Feeds on a wide variety of products but tend not to attack sound grain with <12% moisture content

-                    Originally of Indo-Australian origin, has a cosmopolitan distribution but occurs more so in warmer climates.


 (confused flour beetle):


-                    2.6 – 4.4mm in body length, flattened, oval

-                    Is reddish-brown in colour

-                    Antennal club is poorly formed as a gradual club-like, the "club" consisting of 4-6 segments.

-                     Head is visible from above

-                     Sides of pronotum more curved than on T. castaneum, punctures on centre of pronotum about same size as punctures on lateral margins

-                     Head capsule is notched at the eyes so that a visib

More Information
Specimen Contact
Museum Victoria
Walker, K.
17/06/2006 03:11 AEST
Last Updated
25/11/2011 10:19 AEST
Walker, K. (2006) rust-red flour beetle (Tribolium castaneum) Updated on 11/25/2011 10:19:47 AM Available online: PaDIL -
Image Use
Free for use under the Creative Commons Attribution 3.0 Australia License