Railway-beetle, [251]

Ranatra linearis, [563]

Raptorial legs, [493], [554], [556]

Réaumur, on Xylocopa, [33]

Receptaculum seminis, [140]

Rectal cauda, [538]

Red admiral, [352]

Red ant—see Formica rufa

Reduviidae, [555] f. [537]

Reduvius personatus, [558]