PREFACE. Vi 
the name to the species in the first column: Thus Gonepteryx 
Rhamni of Stephens is the Papilio Rhamni of Linneus; The 
Colias Europome of Stephens is not a Linnean species, being 
printed in Italics; The Colias Hyale of Stephens is the 
Papilio Hyale of Linnzus, and so on. The fourth column 
gives the Habitat of the Insect, and the time of the year when 
it may be found. 
As a guide to the comparative size of the different Insects, 
a mark or a letter of the Alphabet is added after the number 
engraved on the Plate. Thus @ indicates an insect an inch 
and a quarter wide; a + an inch and a half; @ + an inch and 
three quarters; b two inches; ¢ three inches, and so on: n 
denotes insects of the natural size; and m such as are magni- 
fied. For example: in Pl. I., fig. 1. is three inches and three 
quarters wide when expanded; fig. 2. two inches and a half; 
fig. 70. Pl. II. is the natural size, and all in Pl. XLII. are 
magnified. 
The great expense attending works on Natural History, 
where the subjects are accurately drawn and coloured, has in 
a considerable degree confined the sale to persons of opulence, 
and prevented that general access to figures which is so essen- 
tial to the promotion of the science. In the present Work this’ 
objection is removed, since the figures, (excepting those on 
royal paper,) though drawn and coloured with the greatest 
possible care, do not exceed one penny each! 
It now only remains for us gratefully to acknowledge the ready 
assistance we have received from several scientific gentlemen, 
and most especially from J. F. Stephens, Esq., to whom we 
cannot sufficiently express our thanks for his unwearied assist- 
ance throughout the work, and for the liberal manner in 
which he placed his invaluable Collection at our service, not- 
withstanding the risk of injury occasioned by the removal of 
the different Insects from Camberwell to London. 
To the kindness of J. G. Children, Esq., of the British 
