cf. Diogenianus 7.69, alongside the later paroemiographer Macarius Chrysocephalus 7.30. These comparanda make it clear that the Suda compiler probably wrote (or should have written) the adjective dolerw=n rather than the adverb dolerw=s, yielding the more coherent gloss "in reference to those who are deceitful or marveled at."
For words related to the adjective in the phrase, poikilw/teros ('more variegated/ decorated/changeable/versatile') see entries from pi 3079 to pi 3085 inclusive. For the hydra, a mythical multi-headed water serpent, see upsilon 56, upsilon 57, upsilon 58.