Bolivar on eyes of Machilis, [185]
Bombus, dorsal vessel of, [133];
metamorphosis, [497];
B. lucorum, [488]
Bombyliidae, [291]
Bonnet and Finot on Eugaster, [324]
Book-lice, [390] f.
Boreus hiemalis, [451];
larva, [453]
Boutan on concealment of leaf-like Insects, [323]