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- The bugs in the tribe Halyini have the typical shield shape body. They are
usually from brown to dark brown in colour, with triangular-shaped
scutellum.
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 - Nymphs of different species in Halyini
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- The tribe Halyini also known as Halys Group. There are quite a number of different tribe Halyini shield bugs in Brisbane Eucalyptus
forest. Most of them are the typical shield-shaped and looked similar. They include
the genera
Alcaeus, Dippilana, Poecilometis,
Theseus,
Anchines, Bathrus,
Accarana,
Austromalaya and Platycoris.
They are usually large to medium in size with greyish, brownish or
reddish brown in colours. The number of apparent antennal segments varies between three and five.
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They are usually associated with Eucalyptus, Acacia or
sometimes other native plants. They include some of the most common stink
bug species in Australia.
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- Following listed the bugs in this tribe that we found in Brisbane so far;
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- This genera
resemble the Poecilometis genera, however, its front wings membrane
veins is reticulate instead of linear. There are four species in this
genera, we found one in Brisbane.
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- Acacia Shield bug
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- Alcaeus varicornis, body length 20mm
- This genera resemble the Poecilometis genera,
however, its front wings membrane veins is reticulate instead of linear. This bug was very hard to
be noticed on the Acacia tree trunk because of its camouflaged colour. Please
check this page for more pictures and information.
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- We found one species in this genera. This species looks very similar to
the Shield Bug in genera Poecilometis except with
wings shorter than abdomen and the wing veins are different.
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- Theseus modestus, body length 15mm
- This shield bug looks very similar to the Common Gum Tree Shield Bug.
Both can be found on the gum tree trunk. However, this shield bug is
less common in Brisbane. Please check this page
for more information.
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Poecilometis stink bugs can be distinguished from other similar
genera by wings longer than abdomen, with wing veins linear and
mostly subparallel. Antennae are basically 4-segmented but appearing 5-segmented in a number of species owing to a secondary subdivision of the 2nd antenna1 segment.
They have the typical shield-shaped body which is in general longer than
other stink bugs. The head is moderate elongate with round apex.
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- We found four
Poecilometis species in Brisbane. They are common in Brisbane
Eucalyptus Forests.
Looks similar to Poecilometis, but can be distinguished by
the wing veins. There is only one Australian species in Genera Anchises.
- Golden Brown Shield Bug
   - Anchises parvulus, 2nd instars
body length 15mm, adult body length 5mm
- We saw this stick bug mother with her new hatched babies on a gum tree
leaf. When we get near to have a closer look, the mother bug always tilt her
body towards us blocking our vision to her babies. No matter how we
disturbed her, she just stayed on top of her young bugs and did not move a
bit. More information and pictures please click on here.
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- The bug
looks similar to Poecilometis, but can be distinguished by the wing
vein. There is only one Australian species in Genera Bathrus.
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- Zebra Shield Bug
 - Bathrus variegatus, body length 15mm
- This bug is dark brown patterns on and white or pale brown in colour. There
are the metallic green patches on body. Please check this page
for more pictures and information.
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- This shield bug looks very similar to the shield Bug in genera Poecilometis.
We distinguished it by its wing veins.
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- Austromalaya reticulata, body length 20mm
- We found this bug once in Karawatha Forest during mid summer. It was
resting on a burnt tree trunk. Please check this page
for more information.
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- The
stink bug has a round and thick body, brown in colour with typical stick
bug colour pattern. There is eight Australian species in genera Platycoris.
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- Platycoris (Hypogomphus) bipunctatus, body length 12mm
- We found this bug in rainforest near Mt Nebo during late summer. There
were quite a number of them on large gum tree trunks during the day. Some found resting on leaf.
Please check this page for more
information.
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- Reference:
- 1. Insects
of Australia, CSIRO, Division of Entomology, Melbourne University
Press, 2nd Edition 1991, pp 508.
- 2. Stink
Bugs of Australia - FaunaKeys, Australian Museum online 2003.
- 3. Halyini
- Australian Biological Resources Study, Department of the Environment and
Heritage, Commonwealth of Australia 2005.
- 4. Pentatominae - tribe Halyini - by Nick Monaghan, lifeunseen.com.
- 5. A revision of the species of Australian and New Guinea shield bugs formerly placed in the genera
Poecilometis Dallas and Eumecopus Dallas (Heteroptera: Pentatomidae), with description of new species and selection of lectotypes.
- Gross, G.F. (1972). Aust. J. Zool. Suppl. Ser. 15: 1-192 (description, revision).
- 6. Plant-feeding and Other Bugs (Hemiptera) of South Australia. Heteroptera – Part II - by Gordon F. Gross, South Australian Government Printer, Adelaide,
1976.
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