some of our beetles a delightful fragrance. So was it here;
for a Strongylus, attracted by the odour, alighted on the
fungus as I carried it in my hand. We here see in two distant
countries a similar relation between plants and insects of the
same families, though the species of both are different. When
man is the agent in introducing into a country a new species,
this relation is often broken: as one instance of this I may
mention, that the leaves of the cabbages and lettuces, which
in England afford food to such a multitude of slugs and
caterpillars, in the gardens near Rio are untouched.

During our stay at Brazil I made a large collection of
insects. A few general observations on the comparative
importance of the different orders may be interesting to the
English entomologist. The large and brilliantly coloured
Lepidoptera bespeak the zone they inhabit, far more plainly
than any other race of animals. I allude only to the
butterflies; for the moths, contrary to what might have been
expected from the rankness of the vegetation, certainly
appeared in much fewer numbers than in our own temperate
regions. I was much surprised at the habits of Papilio
feronia. This butterfly is not uncommon, and generally
frequents the orange-groves. Although a high flier, yet
it very frequently alights on the trunks of trees. On these
occasions its head is invariably placed downwards; and its
wings are expanded in a horizontal plane, instead of being
folded vertically, as is commonly the case. This is the only
butterfly which I have ever seen, that uses its legs for running.
Not being aware of this fact, the insect, more than once, as I
cautiously approached with my forceps, shuffled on one side