She does not select one spot rather than another; she bites indifferently at whatever comes within reach.

This being so, her poison would have to possess unparalleled virulence to produce a corpse-like inertia no matter which the point attacked.

I can scarcely believe in instantaneous death resulting from the bite, especially in the case of insects, with their highly-resistant organisms.
Besides, is it really a corpse that the Epeira wants, she who feeds on blood much more than on flesh?
It were to her advantage to suck a live body, wherein the flow of the liquids, set in movement by the pulsation of the dorsal vessel, that rudimentary heart of insects, must act more freely than in a lifeless body, with its stagnant fluids.

The game which the Spider means to suck dry might very well not be dead.

This is easily ascertained.
I place some Locusts of different species on the webs in my menagerie, one on this, another on that.