Male

Female

Larva

Length: 15.7-18mm

Egg	Larva	Pupa	Adult
?	April - August (Earliest: 11.6)	?	All Year (Earliest: 14.3)

Protective Chemicals
Steroids	Cortexone, Cybisterone, Dehydrocortexone

Biotopes:	Ponds
Food: (Larva)	Chironomidae Larvae	Dead Insecta
Food: (Adult)	Aquatic Insecta

UK Beetles: Acilius sulcatus

Pictures © 2003, 2005, 2007 J.K. Lindsey

Caution

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