Bolboceras gallicus, [309], [312]–319, [326]
Bombyx (see [Arbutus Caterpillar], Banded Monk, Neustrian Bombyx, Pine Processionary)
Brown Owl, [250]
Brush Caterpillar (see [Orgyia])
Bull-pup, [257]
Buridan, Jean, [73]
Burying-beetle (see also [Necrophorus]), [319]
Butterfly (see also the varieties), [182], [227]