Bacteriides, [277]

Bacunculides, [277]

Baëtis, [433]

Ballostoma, [196]

Ballowitz on spermatozoa, [140]

Barber, Mrs., on S. African locust, [294]

Barbitistes yersini, [321]

Barnston on Perlidae, [402], [405]

Barriers with eggs, [461]

Base, [112]