ALTERNATING GENERATIONS

ADLER & STRATON

London

HENRY FROWDE

OXFORD UNIVERSITY PRESS WAREHOUSE AMEN CORNER, E.C.

New York

MACMILLAN & CO., 66 FIFTH AVENUE

J

A Biological Study of

Oak Galls and Gall Flies

By Hermann Adler, M.D.

Schleswig

TRANSLATED AND edited BY

CHARLES R. STRATON

F.R.C.S. ED., F.E.S.

WITH ILLUSTRATIONS

Oxford

AT THE CLARENDON PRESS

1894-