Ocelli, [97], [282], [313], [400], [409], [430];

variation in, [267], [536]

Odonata, [409] f.

Odontocerum albicorne, case of, [480]

Odontura serricauda, [316]

Oecanthides, [340]

Oecanthus, [339]

Oecodoma—see Atta

Oedipodides, [304], [309]

Oenocytes, [137]