In the present report I wish to define five species of crane-flies from California, all belonging to the subgenus Lunatipula Edwards of the major genus Tipula Linnaeus. These specimens were collected by Messrs. T. H. G. Aitken, Mont Cazier, Otto Degener, Anthony Downes, and C. D. Michener, to whom I am greatly indebted for the privilege of retaining the types of the various species. In western North America, the subgenus Lunatipula is represented by a host of species that break up into several well-defined groups of forms.