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 Bess Beetle - Aulacocyclus sp. 

Family Passalidae

This page contains information and pictures about Brown Bess Beetles that we found in the Brisbane area, Queensland, Australia.
Body length  30mm
We found this group of Bess Beetles when we accidentally open a rotten log. There was a moist area just next to a small creek in Venman Bushland on Sep 2011. There were a dark brown adult, four to five brown adults and three to four large larvae living in the chamber of the rotten wood. There were also two earth worms. 
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They are shiny, dark brown and brown in colours with body parallel-sided. Wing-covers have parallel grooves along. There is a narrow waist between prothorax and elytra, scutellum is not visible. 
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Passalid Larvae

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Larvae look similar to Scarab larvae, are grub-liked but not in c-shaped, always live in concealed habitats, sluggish, cylindrical, with a well-developed head. 

1. Insects of Australia, CSIRO, Division of Entomology, Melbourne University Press, 2nd Edition 1991, p 627.
2. Insects of Australia and New Zealand - R. J. Tillyard, Angus & Robertson, Ltd, Sydney, 1926, p226.
3. Beetles of Australia - Trevor J Hawkeswood, Angus & Robertson Publishers, 1987, Plate 48.
4. Passalidae - Australian Biological Resources Study, Department of the Environment, Water, Heritage and the Arts, 2008.

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Last updated: September 11, 2011.