39 
dexed for use. A photo-engraving of one of these pages, exact size, is 
here reproduced (Fig. 6): . 
| dane th ears 96, | 
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otis fot te wow sche fulistamness come rode 
op plant,’ of HRY ufrow Cranes Va Lew are 
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re o Grvete) outed) when olrer” wi frag merlin wat 
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w [ke Days Laty broods hay G erreaiin in Cotoune, 
iso 
Fic. 6. 
By the time the numbers of his plates had assumed some importance 
a set of larger note books had been prepared, into which he recopied 
the data above mentioned, together with notes of his own observations, 
besides references to figure and plate of his own werk. These were 
prepared for each of the principal orders; and for two or three, as the 
Lepidoptera, Coleoptera, and Diptera, an additional series in which the 
food plants were alphabetically arranged, with a list of the species of 
insects frequenting or destroying them following each plant named. In 
time, as the number of plates increased, as his observations became 
more extended, and entomological publications had become more numer- 
ous; and as the old books were bursting their covers, a set of letter- 
size blank books were obtained, and the entire mass of notes recopied 
on afar more exhaustive plan, the whole finally constituting the material 
of the text which would accompany the plates when published. 
This was evolution pure and simple, for I have always considered 
that the text of Professor Glover’s work was the direct outgrowth of 
