The Butterflies of the British IslesSouth, Richard
Science
The Butterflies of the British Isles
South, Richard
Butterflies -- Great Britain; Butterflies -- Great Britain -- Identification; Lepidoptera -- Great Britain
Manipulation of the specimen on these boards is as follows. Having
carefully pinned it, leaving the greater length of pin below the insect,
guide the pin carefully through the narrow opening (_a_ Fig. 15) and the
cork (Fig. 16) below to a suitable depth, so that the body of the insect
rests in the groove and the wings lie easily on the board. Then take two
strips of tracing cloth, glazed side downwards, and pin them on at the
end of each side of the setting-board (Fig. 17). The strip should be
just wide enough to cover all but the basal part of the wings. Now pass
the strips over the wings, press one side lightly with the fingers of
the left hand while the wings are moved into position with the setting
needle (a fine needle with eye end fixed into the stick of a small
penholder will do for this) from the uncovered base, a pin being
inserted below the fore wing while the hind wing is brought into
position, but when this has been done and another pin inserted to keep
it in place, as shown in the diagram, the first pin may be removed;
repeat the same operation on the other side. Other pins will be required
to keep the horns, etc., in place. In dealing with the next specimen the
strips will have to be turned back while it is fixed into position, then
proceed as before. An imaginary line following the inner margin of the
fore wings and passing through the pin on the thorax is an excellent
guide to uniformity in setting. The groove will prevent the pin leaning
to either side, but care should be taken that it does not incline either
forwards or backwards. The strip of tracing cloth may be used more than
once, but the roughness of the pin holes should be removed by drawing
the strip across the back of a knife.
[Illustration: FIG. 16.
=Longitudinal Section of Setting-board.=]
[Illustration: FIG. 17.
=Setting-board in use.=]
[Illustration: FIG. 18.
="Saddle" Setting-board.=]
[Illustration: FIG. 19.
=Setting-bristle.=]
[Illustration: FIG. 20.
=Brace and Band Modes of setting.=]
The setting-boards most frequently used in this country have sloping
sides, and are known as saddles (Fig. 18). Where tracing cloth is used,
the _modus operandi_ is exactly similar to that just described, but
small pins will do for pinning down the strips, as the saddles are made
of cork, or cork carpet, instead of wood.
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