Fleas are oviparous, and undergo a very complete metamorphosis.
There are many large and poisonous spiders and flies; fleas and mosquitoes abound.
"Why, fleas, crickets, grasshoppers," answered the buffoon.
(I) Plague can be carried by fleas from an unhealthy rat.
Fleas are wingless insects, with a laterally compressed body, small and indistinctly separated head, and short thick antennae situated in cavities somewhat behind and above the simple eyes, which are always minute and sometimes absent.