Among these there occur not merely species which are edible, and thus require the protection of a disguise, but others which are rejected on account of their unpalatableness.    From Wordnik.com.  [Evolution in Modern Thought] Reference

I shall beard him in his gullet, and, while he lingeringly chokes to death over my unpalatableness and general spinefulness, do you, fair damsels, flee to the mountains lest the valleys fall upon you.    From Wordnik.com.  [The Little Lady of the Big House] Reference

Wallace in the "Westminster Review," July, 1867, page 37, on the protection to the female insect afforded by its resemblance either to an inanimate object or to another insect protected by its unpalatableness.    From Wordnik.com.  [More Letters of Charles Darwin — Volume 2] Reference

It is true that this explanation of the bright, conspicuous colours is only a hypothesis, but its foundations -- unpalatableness, and the liability of other butterflies to be eaten, -- are certain, and its consequences -- the existence of mimetic palatable forms -- conform it in the most convincing manner.    From Wordnik.com.  [Evolution in Modern Thought] Reference