Raptorial legs, [242] f., [257], [463], [484]

Ratzeburg, on Anomalon, [553];

on trochanter, [520]

Ravages of Termites, [388]

Réaumur, on ant-lions, [455];

on circulation of silkworm, [135];

on galls, [525];

on may-flies, [438], [441];

on sawflies, [512], [513];

on spheroidal condition, [164]