Lygaeidea & Pyrrhocoroidea

Ant-mimicking Seed Bug I
Ant-mimicking Seed Bug II
Brown Seed Bug
Black and White Seed Bug 

Cotton Stainers Bugs - Family Pyrrhocoridae

Pyrrhocorids are medium to large insects. They are usually colourful, with striking patterns of yellow, red, black and white. The head is triangular. Bugs in this family resemble Lygaeidae but can be distinguished  by Pyrrhocorids do not have the ocelli. The antennae and labium are 4-segmented, with the labium often extending well beyond the base of the abdomen. The hemelytral membrane has numerous reticulating veins. Bugs in this family mainly feed on Malvaceae, including cotton. 

Pale Cotton Stainer Bug
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Dysdercus sidae, body length 15mm  
We find quite a number of this bugs on a Malvaceae Abutilon plant in early summer. We saw only the adults but no nymph around. They have the red and black head, red eyes and pink to orange body, with a small black dot on each forewing. The bugs are known will attack cotton, staining the lint and damage the seed. More information can be found here.
Black Fire Bug
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Dindymus sp., body length 10mm
Found on Nov 2008 in Karawatha forest, the bug was hiding under loose bark, jump onto the ground when disturbed. Please check this page for more infromation.
Orange Fire Bug
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Dindymus sp., body length 10mm
We found this Orange Fire Bug in Karawatha Forest on Dec 2010. Please check this page for more information.

1. Insects of Australia, CSIRO, Division of Entomology, Melbourne University Press, 2nd Edition 1991, pp 429.
2. Plant Bugs - Dr Murray Fletcher, PRIMEFACT 508, NSW DPI, May 2007.
3. Family PYRRHOCORIDAE -  Australian Faunal Directory, Australian Biological Resources Study. 
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Last updated: February 22, 2012.