4 PREFACE 
the paper were thus brought about. Furthermore, by the 
generosity of the author, the great majority of the speci- 
mens, in fact all except the unique ones, have been pre- 
sented to the Department, so that the monograph does 
actually treat of Oxford material, and the subject itself can 
be better studied in Oxford than in any other place outside 
the Indo-Malayan Sub-Region. The sixth paper, a criticism 
of the hypothesis of ‘Conscious Protective Resemblance,’ 
is in part by Mr. Guy A. K. Marshall, in part by the Hope 
Professor. Dr. F, A, Dixey ‘contributes, an’ interesting 
account (7 and 8) of Lepidoptera from the White Nile, 
kindly presented to the Department by Mr. W. L. S. Loat, 
together with further notes on seasonal dimorphism in 
butterflies. Mr. Guy Marshall's demonstration, by breeding, 
of the wet and dry phases of Preczs actia is described in 
(10). The specimens themselves, which have historic value 
and interest, have been generously presented to the 
University. The first investigation ‘into insect bionomics 
undertaken in the Department forms the subject of the 
tenth memoir. The publication was delayed many years 
because the notes and drawings were mislaid in 1894 
during the alterations. Two other short papers on insect 
bionomics (5 and 9) are also by the Hope Professor, 
together with a brief sketch (12) of the influence of Darwin 
upon Entomology. 
Papers 13 to 20 inclusive deal with systematic and 
faunistic questions. A valuable account (13 and 14) of 
the Oxford types belonging to the Hemipterous families 
Pentatomidae and Coreidae is given by Mr. W. L. Distant. 
Interesting new spiders presented by Mr. Shelford and 
Mr. Marshall are described (15) by the Rev. O. Pickard- 
Cambridge. Papers 16 to 19 inclusive treat of the col- 
lection of Balearic insects made in 1900 by the Hope 
