columns, lines should be {58} ruled varying in distance according to the
breadth of the butterflies, and small labels should be pinned down at the
foot of each species giving its _specific_ name; the name of the genus
being placed at the head of the _first_ species of the genus. The names of
the families and sub-families under which the _genera_ are classed are also
generally given in their respective places.

I have in this little work followed the system of classification used in
the _public_ collection of British butterflies at the British Museum, which
seemed to me more intelligible and natural when applied to our very limited
number of butterflies, than did the system of Doubleday adopted in the
great world-wide collection which exists in the private entomological room
of the British Museum.

The following table gives the first-mentioned arrangement of all the
British species under their respective genera, sub-families, and families.
The most authentic of the _reputed_ species are also here inserted in their
proper places.

Fam. PAPILIONIDAE.
Sub-fam. PAPILIONIDI.
PAPILIO Machaon.
-- Podalirius.
Sub-fam. PIERIDI.
GONEPTERYX Rhamni.
COLIAS Edusa.
-- Hyale.
APORIA Crataegi.
PIERIS Brassicae.
-- Rapae.
-- Napi.
-- Daplidice.
EUCHLOE Cardamines.
LEUCOPHASIA Sinapis.

Fam. NYMPHALIDAE.
Sub-fam. SATYRIDI.
ARGE Galathea.
LASIOMMATA Egeria.
-- Megaera.
HIPPARCHIA Semele.
-- Janira.
-- Tithonus.
-- Hyperanthus.
{59}
EREBIA Blandina.
-- Ligea.
-- Cassiope.
CAENONYMPHA Davus.
-- Pamphilus.
Sub-fam. NYMPHALIDI.
LIMENITIS Sybilla.
APATURA Iris.

Sub-fam. VANESSIDI.
CYNTHIA Cardui.
VANESSA Atalanta.
-- Io.
-- Antiopa.
-- Polychloros.
-- Urticae.
GRAPTA C. Album.

Sub-fam. ARGYNNIDI.
ARGYNNIS Paphia.
-- Aglaia.
-- Adippe.
-- Lathonia.
-- Euphrosyne.
-- Selene.
-- Dia.
MELITAEA Cinxia.
-- Athalia.
-- Artemis.

Fam. ERYCINIDAE.
NEMEOBIUS Lucina.

Fam. LYCAENIDAE.
THECLA Betulae.
-- Pruni.
-- W. Album.
-- Quercus.