Golden Stag Beetle

Black Bess Beetle
Brown Bess Beetle

Black Dung Beetle
Greed Dung Beetle
Punctated Dung Beetle 
Green Scarab Beetle
Brown Cockchafer
Yellow Cockchafer
Nectar Scarab Beetle 
Common Christmas Beetle
White Christmas Beetle
Golden Christmas Beetle
Green Christmas Beetle 
Black Nail Beetle
Small Brown Scarab
Small Black Scarab 
Rhinoceros Beetle
Cowboy Beetle
Red-brown Flower Beetle
Fiddle Beetle
Spotted Flower Chafer
Brown Flower Beetle
Mango Flower Beetle


Brown Cockchafer - Rhopaea magnicornis


This page contains information and pictures about Brown Cockchafer Beetles that we found in the Brisbane area, Queensland, Australia.

Body length 22mm
This beetle is also known as Rhopaea Cane Grub. They are reddish-brown in colour and with a hairy body. Notice its antennae is short and fan-like. We found this beetle in summer night flying towards our windows.
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The larvae,  known as white cane grubs,  live in soil and root parts of plants.
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Those beetles attached by our windows light and we found their body near our house.
Every year in late spring to early summer (Sep-Oct), large number of them were found around our backyard at night. They were attached by window light. They all disappeared in the next morning.
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They pupate in cell deep in soil. When become adults, they stay remains in the cell, wait until rain softens the soil and come out. This makes the adults come out from soil in the same time, synchronizes as the mating flight. They are active at night. 
From the reference information, the beetle of this genus do not feed at all in adult stage. The males locate females by means of a sex pheromone emitted by the virgin females.

1. Wildlife of Greater Brisbane - Ryan, Michelle (ed.), Queensland Museum, Brisbane, 1995, p.91.
2. Rhopaea canegrub - PaDIL, Pests and Diseases Image Library, 2008.
3. Rhopaea magnicornis Blackburn, 1888 - Australian Biological Resources Study, Department of the Environment, Water, Heritage and the Arts, 2008. 
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Last updated: March 31, 2011.