If you would see the ants to advantage—to your own, that is—you must
turn over a pasture stone under which one of the species of small
yellow ants has its nest. By thus gently removing the roof, if it is a
good-sized stone, the whole colony will be in view at once. The red-ant
hill presents difficulties. To dig into it or to pull it apart is quite
useless, as the earth falls in and nothing is to be seen but a
struggling heap of dusty and indignant ants. It rarely happens that
such a hill may be built around a small boulder. If this boulder is
suddenly and deftly removed, not dragged or rolled aside, but lifted
clear of the hill so that the sides of the nest may not be broken in, a
remarkable scene is disclosed.
I have found such an ant hill, and by removing the stone the household
was placed on exhibition—but not all its secrets revealed by any
means. From several large chambers, now roofless, galleries and
corridors radiated in all directions. The instant the stone was lifted
the ants swarmed from the galleries into these chambers, which were
packed with the large cocoons. There were thousands of pupæ, of a
delicate brown tint, looking wonderfully clean and fresh, but with such
celerity did the ants work that inside of ten minutes all were carried
from view.
Among the rest were perhaps a dozen young ants, the head and thorax
being white and the abdomen a pale mauve. These creatures moved feebly
about, taking no interest in the proceedings, and were for the most
part seized by the workers and conveyed into the galleries. Apparently
they were individuals that had just emerged from their pupa-cases.
Under another large stone were two very numerous colonies living side
by side, of different species. The nests were, of course, entirely
separate and under opposite ends of the stone. The smaller of the two
appeared to be stinging ants, for they clustered in great numbers over
their small pupæ, elevating their abdomens in a threatening manner like
so many diminutive scorpions. The other species were large and active
ants of a polished bronze hue. Their pupæ were naked, which gave the
nest the appearance of being filled with grains of rice.
These large ants set to work with frenzied activity and removed all of
their own pupæ. Then, and not until then, they swarmed over into the
adjoining nest and began carrying the cocoons of the small ants back
into their own nest. Now and then some small ant bolder than the rest
would resist, and an individual combat ensued which ended by the large
ant carrying off her small antagonist. There was, however, very little
resistance of this sort, and the pillage, if such it were, continued
until the remaining cocoons had all been carried over into the nest of
the large ants. So few of the small ants made any resistance that it
gave one the agreeable impression the larger ants were only offering
assistance. But I failed to find on subsequent visits that they had
returned the pupæ. And although they daily brought their own pupæ out
of the galleries, the smaller cocoons never more came to view, and the
small ants subsequently abandoned their nest. Thereafter I felt some
compunction in thus disturbing a whole community for mere curiosity.
It is noticeable above all how the ants at such times take no thought
for their own safety, but for that of their charge solely. Whether
their interest is in any sense maternal or merely a property interest
does not appear. Another feature evident in disturbing a formicary is
the general harmony in which the individuals of any one colony work
together. Here is no less than a catastrophe, as if the roof of one's
house were suddenly to be removed and everything upset. And yet not one
runs away or apparently conflicts with any other. There are no cross
purposes; no two get in each other's way; but animated by a common
motive, and by one only, the community proceeds with despatch to the
work in hand.
Is this socialism among ants something preordained for them as the
condition of their life, or is it in part an acquired tendency of the
ants themselves? That they do acquire tendencies would seem clear
enough. If it should be proven that this social state is in fact the
result of an evolution among them, it would be one of the most
significant facts of natural history.
It serves the community admirably at any rate. But with them the
individual does not count. Ants are ahead of us in one respect in that
they have order without coercion. There is such harmony, such
co-operation among them, they have evolved no ruling class, the queens
being such only in name and more properly the mother ants. The life of
the community is all, and every one looks out for it.
On warm afternoons early in September you may look for the swarming of
the queens, when myriads of ants sail into the air in their desultory
marriage flight. In apparently endless succession they pass, every now
and then one alighting, whereupon begins the curious part of the
performance, for they run rapidly about, throwing themselves upon their
backs to squirm from side to side after the manner of a dog scratching.
They then get upon all sixes and continue running to and fro. After
these contortions the wings wear a most disheveled appearance, and, as
the process continues, become more and more crumpled, until at length
one or more are missing.
Sometimes in sheer desperation an ant will lie on her back and revolve
rapidly in this position. In some cases the wings seem to resist all
attempts to remove them and the ants redouble their efforts. Their
frenzy appears to know no bounds; they fairly stand on their heads and
repeatedly fall over miniature precipices and into Lilliputian
crevices in their blind determination to tear off the wings. Again they
seem to use their legs as though trying to twist off a wing. It is the
most fanatical performance to be witnessed among insects.
Such dogged persistence must sooner or later attain its end, and
presently the ant is seen running about wingless or perhaps with only a
torn stub left. The behavior is no longer frantic as before, but she
now moves about as if enjoying great relief. During one such flight
great numbers came down into a gravelly path through a huckleberry
patch. They apparently avoided the bushes on either hand, and chose to
alight in the path, for it was alive with ants twisting and turning and
wriggling upon their backs in the gravel. Others, having gotten rid of
their wings, were attempting to go head foremost into the ground,
possibly with a view of laying their eggs, or merely because the soil
was their natural element.
Around the formicary itself the workers were grouped en masse,
endeavoring either to restrain the new brood of queens in the old
colony or to coerce them into leaving. They appeared to drive them as a
squad of police might force back a crowd. But it is manifestly
difficult to interpret their motives with any assurance, and it is more
likely they were provoking them to flight. At such times they ascend
the branches of a bush and collect in excited little groups on the buds
and flowers around the females, as if determined they should go. No
doubt it is an exciting day with them, a sort of Labor Day
demonstration. In this case it is the womenfolk who are thus bent on
asserting their rights and doing as they will. But why, having once
ascended into the larger world and the liberty of winged creatures,
must they insist on tearing off this means of freedom to become
crawling, laborious insects? They appear to hear two calls, one from
above and the other of the earth, earthy, and to obey the latter. But
it is with them the race and the future—always the future.
To an ant a tree is a forest in itself. Ascending its mammoth trunk to
the upper regions, she follows the great highways of the branches, out
into the unknown and trackless wilderness of leaves in pursuit of her
game—the aphid. She knows well in what wild and solitary uplands to
look for this mountain-goat.
The under side of maple leaves affords good pasturage to numerous green
aphids which there browse contentedly in the pleasant shade and under
the watchful eyes of the small brown ants that herd them. The aphids
are all sizes and ages, though as to age the difference is probably but
a few days. With a glass, the process of "milking" may be observed, the
ants merely stroking the aphids with their antennæ. Two small tubes,
like sap quills, protrude from the back of the aphid, and from time to
time minute glistening drops are seen to exude from these tubes and are
removed by the ants in attendance. Surely, to the ant here is the land
of milk and honey. They move constantly to and fro among the aphids,
now and then stopping to stroke one. Apparently they detect by some
signs which are ready to yield the sweet fluid. Their presence appears
to be agreeable to the aphids and is never in the least resented. After
long watching with the glass, I have never seen anything akin to
insubordination. Pluck the leaf ever so gently and hold it in a proper
position, the difference is at once apparent to the aphids, for there
begins an exodus, and large and small troop up the stem of the leaf and
so on to whatsoever it may be attached; nor does it cease until they
have deserted to the last one.
But the life of ants is by no means given over to these bucolic
pursuits. While the meadow-ants seem to be in the pastoral stage, the
red species and the large black ones are hunters and warriors. The most
sanguinary conflict I have witnessed was a battle of the ants. Two
armies of the same black species met on the floor of a neighbor's barn.
The battle lasted throughout several days, and both sides fought with
indescribable ferocity. Where they came from was a mystery, as no such
colonies of ants had ever been seen thereabouts.
They appeared to be of the species Formica pennsylvanica which nests
in trees, but these do not occur in very large colonies, whereas the
contending hosts upon the barn floor were as the Tartar hordes. The
floor was strewn with struggling pairs and with the dead and injured,
and always fresh forces were arriving.
The persistence with which they fought is only to be compared to that
of bulldogs, while they showed the ferocity of weasels. Once let an ant
get another by the thorax and she would continue crunching and sawing
until she had severed the head, notwithstanding in the meantime one or
several of her own legs had been cut off by her antagonist. This was
the usual outcome of the various individual combats.
From time to time I placed pairs of combatants on the slide of a
dissecting lens, and through the glass observed them as in an arena. It
was a miniature combat of gladiators, but with no appeal for mercy on
the part of the vanquished. Much evidently depended on the best hold,
as in wrestling, for there was no dislodging an ant once she had
secured it. Under the lens the comparatively great strength and the
skill and relentless ferocity of these miniature warriors became more
evident and was astonishing to witness.
A bird's-eye view of the battle-field revealed no plan of action nor
any directing genius. It was every one for himself—or rather
herself—but there was absolute unity of purpose. Occasionally some
could be seen running about with the heads of the vanquished suspended
on their antennæ, whereon the jaws had closed in the death-struggle,
not again to be relaxed. These ants appeared to seek no relief from
such a monstrous encumbrance, nor seemingly was any offered by their
comrades. Others were crawling on an uneven number of legs in search of
new foes. The cause of such a conflict among ants of the same species
remains a mystery—one of the many mysteries.
Every year the red ants raid the common blacks for the purpose of
making slaves—a most highhanded proceeding. This season I came upon
the invading host marching up the road about ten in the morning of July
28th. The invasion had but lately begun, as the ants were carrying no
pupæ; it was the skirmish line. As the column advanced, frequent and
rapid communication took place between individuals and stragglers who
were coming back. Later, when the raid was well under way, there was
little of this. The nest of the red ants was by the side of a path in
the woods which led out to the wagon road, while the negroes were
domiciled some distance up this lane. Now the column of red ants
followed the path and the road the entire way, in place of going
directly through the bushes, though it doubled the distance, which thus
amounted to some fifty yards.
Red ants were soon pouring out of the various openings in the nest of
the blacks, carrying both pupæ and larvæ, and rarely one passed with a
bunch of small white eggs. Several black queens came out of the nest,
and as they emerged were set upon by red ants, which tried to hold them
by their wings. They managed, however, to throw off their assailants,
and ran under my feet, where they were followed by a score of black
workers, all of whom crowded under the soles of my shoes as I stood on
the loose gravel. At noon I timed the ants and found that, on the
average, forty pupæ and larvæ were carried past a given point every
minute. Two unbroken columns now extended the entire distance between
the nests, one advancing and the other returning.
Occasionally one passed carrying a portion of a black ant, a head and
thorax, or an abdomen. Again, one would appear with a live black,
which, when liberated by me, frantically made her escape. Very young
negroes when carried off were never injured. On one occasion several
red ants were struggling with a black, and among them was a black who
fought against her own friend. This is the only case in which I saw a
black ant help the enemy in this way—a traitor, evidently, but
presumably one whose pupa had been captured the year before and reared
in slavery. Whereas the red ants always came to each other's
assistance, the blacks rarely did so.
By five o'clock the raid was practically over for the day. It ceased as
suddenly as it had begun. Early in the struggle a slender, straggling
column had diverged from the main line, about half way between the
nests. I now found the entire body of ants moving in this new
direction. The one raid over, they had undertaken another upon a colony
of blacks some twenty-five yards distant, and were transporting the
pupæ and larvæ at about the same rate as before. To reach this nest,
the column must cross the wagon road, and here a number were crushed
from time to time by passing vehicles. But the marching army passed by
with the stolen pupæ and paid no heed to their wounded comrades. This
second foray ceased before nightfall.
The following morning by ten o'clock the raid had been renewed and a
great stream of ants were bearing away pupæ as before. Whenever the
column moved over dry leaves its progress was distinctly audible, a
rustling sound suggesting the curiously dry crik crik of a serpent.
The footfall of the ants was as incessant as the patter of rain; a
barefooted insect host, a rabble of sans culottes, and the sound of
their marching feet reached my listening ears, as it were in the clouds
above them.
On the fourth day the slavers began kidnapping the blacks themselves
and carrying them unharmed to the nest. Quite often I found them
carrying individuals of their own species. These may have been
deserters or they may have been ants from some other community, who,
learning of the raid, thought to be present at the final sack and
perhaps share in the spoils. A still more puzzling thing was the fact
that some few red ants bore negroes in the wrong direction,—that is,
from the red back to the black colony. I have noticed on former
occasions that the raid may become thus complicated toward its close as
if the ants, drunk with victory, were beside themselves.
On the 7th of August the raid was directed against a new negro colony
some distance further down the road. It was carried on with something
like the usual vigor until the 25th of the month, when it apparently
ceased. The first nests of blacks, in which some few ants remained,
were no longer molested, though the besieging army passed them on its
way to the field of operation. Thus the series of raids of this one
colony of red ants continued for nearly a month.
I found no less than three other raids in progress at this time, among
widely separated communities, so that the marauding spirit was
contagious among them and spread like the war fever. The red warriors
were everywhere in arms and bent on pillage. One hill, being free from
grass, offered a clear view of what was going on at the doorway at
least. Here the black workers—the slaves of a former raid—were
carrying out bits of gravel, while the train of red ants entered,
bearing the stolen pupæ from the pillaged nest. The red ants were at
this time bringing some large queen pupæ which they had great
difficulty in getting over the ground. As they approached the entrance,
the black workers deposited their bits of gravel and ran to their
assistance. Several blacks which remained near the entrance seemed to
act thus as porters, while others about the top of the hill were
engaged as laborers.
Stopping work at about five o'clock, the train of red ants melted away
before one's eyes. They dropped their task very much as a gang of men
do when the whistle blows. Their day at that sort of labor was
therefore only about seven or eight hours, as if some of the principles
of Labor Union were in vogue among these brigands. They would kidnap
only so many hours a day. The slaves, however, kept at work until dusk.
Perhaps the red ants continued inside the nest, disposing of the pupæ
captured during the day, but they brought in none after five o'clock.
Three days had elapsed from the close of this raid when, for some
reason, the entire colony of red ants deserted the hill, carrying the
newly captured slaves and their pupæ with them. They took up their
abode under a cement walk, an unusual place for red ants, and a week of
incessant labor was consumed in carrying the black ants and pupæ to the
new site. This was, then, a bona fide exodus of an entire community.
Under the cement walk to which the colony of red ants had migrated with
their slaves were numerous nests of small brown ants. These swarmed one
sultry afternoon, and as they came pouring out of the cracks in the
walk and clustered on the surface, the fierce red ants fell upon them
with fury, slaying hundreds and leaving most of the bodies on the
walk, though many were carried away. This I took to be a veritable
hunting expedition. Like some other "sportsmen," they appeared to kill
more than they wanted, and the little heaps of winged dead were left to
be scattered by a gust of wind.
On the following day a new chapter opened in the history of this
remarkable colony, for I found them attacking a large negro colony some
distance away. Contrary to custom, the blacks defended their nests with
spirit, and at first seemed to hold their own. Not divining what was to
follow, I was surprised to find the red ants carrying away no pupæ. But
the next day it was made plain enough, for the red ants appeared in a
compact column bearing pupæ and slaves, which but a week before they
had deposited under the walk, and which they were now moving for the
third time. Was this a second exodus or had the move to the walk been
merely an expedient until they should find a more suitable place?
Without further ado they invaded the nest, and four distinct colonies
(the red ants held slaves of a previous year), one red and three black,
with all larvæ and pupæ and some eggs, were thus housed together. One
may imagine the feelings of the unfortunate community on finding not
only an invading army of freebooters, but that some thousands of their
own cousins, children and all, were come bag and baggage to live with
them.
Now the marching column passed close by the nests of the little brown
ants which had been their hunting-ground of the few past days. They
were too engrossed in carrying pupæ to follow the chase, but I found
three of their slaves posted by some small holes in the cement through
which the brown ants left their nests. These negroes remained near the
opening, and, as the brown ants appeared, would reach over the edge and
pull one forth which was soon crushed and tossed aside. During the
several hours that I watched them the three slaves remained so engaged.
From time to time they would run about among the wounded, and picking
up one here or there, apparently give it a nip.
This final move occupied some eight days, and nothing further
transpired in the history of this colony,—that is, above ground. The
war fever subsided as suddenly as it had arisen, and the erstwhile
warriors were perhaps become peaceful educators of the slaves now
being born into captivity with only some vague instinct of freedom,
some race memory handed down from the halcyon days before the advent of
the red Tartar.
If the sluggard is to go to the ant, then let it not be to the red ant,
nor again to the slave, but to some Syrian species known to Solomon,
which stored up provender for the winter, or to the little brown ant
which herds the aphid. Huber relates that he found the slave-making ant
of Europe (P. rufescens) unable to feed itself, so that, if isolated,
it would miserably starve in the midst of plenty. Not to such an ant,
then, should the sluggard go, but to that wise yellow species which,
declares Lubbock, actually brought in and cared for the eggs of an
aphid through the winter, and carried out the young aphids in the
spring to their proper food plant. Certainly should we ever attain to
the dignity of wings, there will be no occasion to emulate the ant,
which, being born into that freedom, tears them from its body, the rest
of its days to crawl upon the earth.