| → excrete. 1859 1860 1861 1866 1872 |
| excrete I watched them for some time through a lens, but not one excreted; I then tickled and stroked them with a hair in the same manner, as well as I could, as the ants do with their antennæ; but not one excreted. 1869 |
|
| ↑ 1 blocks not present in 1859 1860; present in 1861 1866 1869 1872 |
| It is certain, from the observations of Huber, that the aphides show no dislike to the ants: if the latter be not present,
they are at last compelled to eject their excretion.
|
|
| → for the sole 1859 1860 1861 1866 |
| solely for the 1869 1872 |
|
| → I do not believe 1859 1860 |
| there is no evidence 1861 1866 1869 1872 |
|
| → in the world 1859 1860 |
| OMIT 1861 1866 1869 1872 |
|
| → of a distinct 1859 1860 1861 1866 |
| OMIT 1869 1872 |
|
| → in some few cases, 1859 1860 1861 1866 |
| OMIT 1869 1872 |
|
| → be here 1860 1861 1866 1869 |
| have been here 1859 |
| be 1872 |
|
|
would want to
→excrete. I watched them for some time through a lens, but not one excreted; I then tickled and stroked them with a hair in the same
as well as I could, as the ants do with their antennæ; but not one excreted.
I allowed an ant to visit them, and it immediately seemed, by its eager way of running about, to be well aware what a rich flock it had discovered; it then began to play with its antennæ on the abdomen first of one aphis and then of another; and
as soon as it felt the antennæ, immediately lifted up its abdomen and excreted a limpid drop of sweet juice, which was eagerly devoured by the ant. Even the quite young aphides behaved in this manner, showing that the action was instinctive, and not the result of experience. ↑
But as the excretion is extremely viscid, it is
a convenience to the aphides to have it removed;
therefore probably
do not
excrete
→for the sole
good of the ants. Although
→I do not believe
that any animal
→in the world
performs an action for the exclusive good of another
→of a distinct
species, yet each
tries to take advantage of the instincts of others, as each takes advantage of the weaker bodily structure of
So
→in some few cases,
certain instincts cannot be considered as absolutely perfect; but as details on this and other such points are not indispensable, they may be here passed over. |
|
| As some degree of variation in instincts under a state of nature, and the inheritance of such variations, are indispensable for the action of natural selection, as many instances as possible ought to
→be here
given; but want of space prevents me. I can only
that instincts certainly do vary— for instance, the migratory instinct, both in extent and direction, and in its total loss. So it is with the nests of birds, which vary partly
|
