There are many large and poisonous spiders and flies; fleas and mosquitoes abound.
Aristotle explicitly taught abiogenesis, and laid it down as an observed fact that some animals spring from putrid matter, that plant lice arise from the dew which falls on plants, that fleas are developed from putrid matter, and so forth.
Tiberias is notoriously dirty and proverbial for its fleas, whose king is said by the Arabs to hold his court here.
Many wingless insects - such as lice, fleas and certain earwigs and cockroaches - are placed in various orders together with winged insects to which they show evident relationships.
The bacillus has been demonstrated in the bodies of fleas, flies, bugs and ants.