Suboesophageal ganglion, [320]

Sucking-stomach, [311], [449]

Suction by Lepidoptera, [311]

Suctoria, [526]

Supericornia, [546]

Swallow-flies, [519]

Swarming of wasps, [70] n.

Swarms, [62], [65], [67], [80], [135], [467], [505], [584]

Swift-moths, [396]

Symbiosis, of ants and plants, [139];