[3] The lectotype for this taxon from a male specimen, collected from Lake Superior, and is housed within the Museum of Comparative Zoology at Harvard University.

[6] Within New Brunswick, B. annularis is characteristically known to frequent damp clay riverbanks and shaded streams.

This 'complex' of difficult to distinguish species is distributed right across northern North America, and consists of B. annularis, B. breretoni, B. honestus, B. languidus, B.mysticus, B. nebulosus, B. sinuatus, B. stabilis, and B.

The thorax is not as wide as it is long, whilst the base of the abdomen is narrower than the elytra.

The abdomen of this beetle sometimes appears slightly banded as a result of the hind margins of the upper (dorsal) segments being slightly darker in colour.