Xerophyllum simile, [301]

Xiphidium ensiferum, [321]

Xiphocera asina, [303]

Xylobius, [73], [76]

Xylocopa, [494];

metamorphosis, [170];

pronotum, [490]

Xyphidriides, [507] f., [510]

Yolala, [298]

Yolk, [19], [64], [145], [152], [545]