Apart from disturbances similar to those provoked by myself, disturbances that are possible in the everlasting conflict of events, the Spider, jealous of her own web, seems to respect the webs of others.  She never indulges in brigandage against her fellows except when dispossessed of her net, especially in the daytime, for weaving is never done by day:  this work is reserved for the night.  When, however, she is deprived of her livelihood and feels herself the stronger, then she attacks her neighbour, rips her open, feeds on her and takes possession of her goods.  Let us make allowances and proceed.

We will now examine Spiders of more alien habits.  The Banded and the Silky Epeira differ greatly in form and colouring.  The first has a plump, olive-shaped belly, richly belted with white, bright-yellow and black; the second’s abdomen is flat, of a silky white and pinked into festoons.  Judging only by dress and figure, we should not think of closely connecting the two Spiders.

But high above shapes tower tendencies, those main characteristics which our methods of classification, so particular about minute details of form, ought to consult more widely than they do.  The two dissimilar Spiders have exactly similar ways of living.  Both of them prefer to hunt by day and never leave their webs; both sign their work with a zigzag flourish.  Their nets are almost identical, so much so that the Banded Epeira uses the Silky Epeira’s web after eating its owner.  The Silky Epeira, on her side, when she is the stronger, dispossesses her belted cousin and devours her.  Each is at home on the other’s web, when the argument of might triumphant has ended the discussion.

Let us next take the case of the Cross Spider, a hairy beast of varying shades of reddish-brown.  She has three large white spots upon her back, forming a triple-barred cross.  She hunts mostly at night, shuns the sun and lives by day on the adjacent shrubs, in a shady retreat which communicates with the lime-snare by means of a telegraph-wire.  Her web is very similar in structure and appearance to those of the two others.  What will happen if I procure her the visit of a Banded Epeira?

The lady of the triple cross is invaded by day, in the full light of the sun, thanks to my mischievous intermediary.  The web is deserted; the proprietress is in her leafy hut.  The telegraph-wire performs its office; the Cross Spider hastens down, strides all round her property, beholds the danger and hurriedly returns to her hiding-place, without taking any measures against the intruder.

The latter, on her side, does not seem to be enjoying herself.  Were she placed on the web of one of her sisters, or even on that of the Silky Epeira, she would have posted herself in the centre, as soon as the struggle had ended in the other’s death.  This time there is no struggle, for the web is deserted; nothing prevents her from taking her position in the centre, the chief strategic point; and yet she does not move from the place where I put her.