Coreid Bugs
Wingless Coreid

Eucalyptus Tip-wilter Bug IV - Amorbus rhombifer or A. rubiginosus

Family Coreidae

This page contains pictures and information about Wilted-tip-mimicking Squash Bugs that we found in the Brisbane area, Queensland, Australia. They are also known as Wilted-tip-mimicking Squash Bugs.

Male and nymph, body length 20mm, 15mm
This bug is quite common in Brisbane Eucalyptus forest. It usually rest with hanging upside-down on a gum tree new shot, mimicking a dry leaf remain of a wilted tip. The bug has a expanded and flat abdomen.  
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Mimicking dry leaf
Notice the 'wilted tip' that the bug made. The bug just mimics as part of the wilted tip.  


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The different of hind legs between male and female are very obvious in this species.
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When rest, this bug vibrates its antenna tips in a very high frequency.  
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After mating, female lay eggs on host plants. Eggs are laid singly on the leaf surface of young leaves, several eggs are laid close together. From reference information their eggs are green in colour soon become light brown.
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The female found together with the nymph below. 
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3rd instars 
One way to distinguish this nymph from other Amorbus sp. is the middle tibiae narrower than fore tibiae.  
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4th instars  
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5th instars 
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5th instars 
Those nymphs were found during late winter Jan 2005 together with a female adult. They were different colours and patterns, same as the other Amorbus species.


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Notice the 'wilted tip' they'd and markings on leaves on the plants.
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1. Specimen Image Index - Insect Reference Collection Database - ICDB, Western Australian Department of Agriculture, 2006.
2. Coreidae - Australian Biological Resources Study, Department of the Environment, Water, Heritage and the Arts, 2005.  
3. Studies on the biology, immature stages, and relative growth of some Australian bugs of the superfamily Coreoidea (Hemiptera: Heteroptera) - Kumar, R. 1966, Australian Journal of Zoology 14: 895-991 [908].

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Up ] Eucalyptus Tip-wilter Bug I ] Eucalyptus Tip-wilter Bug II ] Eucalyptus Tip-wilter Bug III ] [ Eucalyptus Tip-wilter Bug IV ] Eucalyptus Tip-wilter Bug V ]



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Last updated: August 29, 2010.