VOLUME VI.

HYMENOPTERA (_continued_) (TUBULIFERA AND ACULEATA), COLEOPTERA, STREPSIPTERA, LEPIDOPTERA, DIPTERA, APHANIPTERA, THYSANOPTERA, HEMIPTERA, ANOPLURA, by DAVID SHARP, M.A., M.B., F.R.S.

_SATURDAY REVIEW._--"Dr. Sharp's treatment is altogether worthy of the series and of his own high scientific reputation.... Certainly this is a book that should be in every entomologist's library."