Réaumur, René Antoine Ferchault de, [25]–26, [58], [73], [87], [92], [96], [102], [225]

Red Cicada, [59], [71]–72

Red-legged Partridge, [358]–359

Reindeer, [251]

Rhinoceros, [53]

Ringed Calicurgus (see [Pompilus])

Rodwell, Miss Frances, [viii]

Rondelet, Guillaume, [51]

Rose-chafer (see [Cetonia])

Rumford, Benjamin Thompson, Count, [160]–162