40 
these little pocket reference books, a number of which he gave me, and 
which are valued souvenirs. 
When recently examining the manuscript left by Mr. Glover, now in 
the National Museum, 1 found with his text of the Diptera the preced- 
ing volume of notes also, from which it had been copied, illustrating 
perfectly his method, as described above. In this volume, as with 
others, when the blank pages had been covered, slips of paper of vari- 
ous shapes and sizes were pasted in ; the accumulation of these slips 
and the inserted pages making it in time difficult to find any thing 
readily, and then the new blank book was necessitated. With each re- 
copying he made changes, revising, adding new facts, and giving fullei 
accounts of particular insects, so that the new volume of notes 111 a 
short time grew to twice the size of the one that preceded it. As an- 
other example, the manuscript of his " list of animal and vegetable sub- 
stances injured," accompanying the Lepidoptera, in all something less 
than 100 pages, he copied in seventeen days, in the winter of 1870, the 
dates of commencement and completion being recorded on one of the 
fly leaves of the volume. 
The fact that the text of his work was brought together in this man 
ner will account in a measure for its apparent incongruity in the differ- 
ent parts, considered in the light of an entomological work, which the 
plates were supposed to illustrate. In reality the plates were the 
u work," and the text or subject-matter a secondary consideration. 
That it has been gradually evolved from a very early beginning is 
shown, too, by its many references to Westwood, to the old German 
work by Leunis, and other of the earlier authorities whose publications 
in modern times have been entirely superceded by the many recent 
works that have kept pace with the progress of entomological science 
in the United States. As these extracts and references referred chiefly 
to general habits of groups and families and to classification, the neces- 
sity for a later revision was not fully appreciated. Mr. Glover always 
had a very high appreciation of Westwood,* regarding the work some- 
thing in the light of an entomological bible, and to that extent always 
a safe rule and guide for the seeker after truth. In minor portions, 
therefore, his text was not fully adapted to the American student: and 
his material from Leunis less so. In his treatment of species, however, 
he aimed to give in very condensed form the known facts , from whatever 
reliable source they were obtainable. That the work remains in an un- 
finished condition is due to the sudden failing of his health. 
But the scheme of the work as contemplated by its originator was a 
grand one. No more complete reference book of entomology was ever 
conceived or more practically carried out as far as he had been able to 
carry out the design. This, in substance, is the scheme of arrangement 
as tar as relating to species. 
'Introduction i<> the Modern Classification <>i Insects, -' vols., is;ii. 
