Although by no means in favour of the excessive subdivision of genera,
I am of opinion that Ochsenheimer’s genus _Deilephila_ has been
correctly separated by Duponchel into the two genera _Chærocampa_ and
_Deilephila_, _sensû strictiori_. Such a division may appear but little
necessary if we examine the perfect insects only; but the developmental
history of the caterpillars shows that there is a wide division between
the two groups of species, these groups however being branches of one
stem.