Wistinghausen on tracheae, [129]

Wood-Mason on Cotylosoma, [272];

on mandibles, [95];

on Mantidae, [251], [253];

on Oligotoma, [352];

on phonation of Mantidae, [258]

Woodworth on embryology, [146], [153]

Workers, [361], [374], [488], [495]

Wyandotte Caves, Myriapods in, [34]

Xambeu on Palmon, [546]