spider

Concise Bible Dictionary:

Argiope lobata
2. semamith. This is supposed to refer to a lizard, which has wide feet like hands, by which it holds fast to the wall while pursuing its prey. It is translated “lizard” in the RV; but others prefer some species of spider (Prov. 30:2828The spider taketh hold with her hands, and is in kings' palaces. (Proverbs 30:28)).
Lizard in Avdat (Israel – The Negev)

Strong’s Dictionary of Hebrew Words:

Transliteration:
smamiyth
Phonic:
sem-aw-meeth’
Meaning:
probably from 8074 (in the sense of poisoning); a lizard (from the superstition of its noxiousness)
KJV Usage:
spider