One of several, very similar Sepsidae species. Detailed examination is needed for safe species identification.

• Supra-alar present.  
• Humeral seta present.  
• Sternopleurum white pruinose.  
• Mesonotum and humeri glossy black.

Unless identified by a recognised expert, a photo is required and the specimen should be examined with a microscope. In the comments box, state the key or ID method used and describe the size and identifying characters.

Common around water.

May to September.

Known to breed in cow dung.

Widespread and fairly frequent in Britain.

Status in Leicestershire and Rutland not known.