OLOCENTROS, in natural history, a name given by the old Greeks to a small animal of the spider kind, whose bite was accounted mortal. It is the same with the solipuga, so called from its flinging, or biting most violently, in places, or seasons, where the sun had the most power, as Africa, &c. The name solipuga was a corrupt way of writing that word; and this seems also a false way of writing the word helocentros, which signifies the same as solipuga.