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bers, references to notes, experiment, in fact, all available information 
pertaining to the species represented by the check-list number. 
The record cards are placed in the file with and succeeding the 
species cards, bearing a corresponding check list number or name. If 
the space on the first record card is not sufficient to accommodate all 
necessary entries. another is taken, and so on, using aS many cards as 
may be required for all references or for full notes as desired. 
All experiments, special investigations, and observations must have 
reference to some species of insect; therefore, in case it is found neces- 
sary to make a note or record having reference to a known species, of 
which specimens are not desired or can not be taken, instead of making the 
entry in the accessions catalogue, regulation record cards are used for 
the purpose, and the notes are entered under the name of the species, 
and the cards are placed in their proper positions in the species-cata- 
logue file. In fact, if desired, the species catalogue may contain copies 
of all notes, records, descriptions, drawings, and all other material 
necessary for a full treatise or report on a species; or, in other words, 
any number of the record cards required for notes referring to a single 
species may succeed the species cards, provided they all bear the 
check-list number or name and have letters or Roman numbers in the 
upper right-hand corner to indicate their relative position in the series. 
In order to explain amethod of cross references used in this system, 
we will suppose that a set of pinned specimens, accompanied by their 
respective accessions catalogue numbers, are sent to a specialist for 
determination, and in due time we receive the list of names according 
to the accessions numbers. If the specimens belong to the order 
Coleoptera we take Henshaw’s list and enter each of the accessions 
numbers immediately to the right of the corresponding specific name 
in the check list. Then we take the accessions catalogue and enter the 
proper check-list numbers in the spaces at the left of the notes bear- 
ing corresponding numbers to those of the determined species. The 
names of the species and their check-list numbers are then entered on 
the species card and references or full notes are copied on the record 
cards. After all necessary entries and cross references are made we 
place two labels on the pins bearing the determined example, or on 
duplicates having the samenumber. The first label bears the accession 
number and the name of the collector; the second label bears the 
check-list number, the name of the insect, and name of the person 
responsible for the determination. The specimens are then placed in 
their relative positions in the systematic reference and duplicate col- 
lections. As subsequent material belonging to a determined species is 
determined or added to the collection, the proper check-list number is 
entered in the accessions catalogue, and the pinned specimens are placed 
with the labeled specimens in the duplicate collection. The duplicate 
alcoholic, biologic, and economic material is placed in envelopes or pack: 
ages which are marked with the proper check-list number and the 
name of host plant or insect. 
