Order of insects called Siphonaptera, which means wingless siphon.

Click here for photo Human flea, Pulex irritans. ęStephanie Boucher
Fleas are one of the more important groups of insect pests because they not only cause discomfort by biting, but they can transmit several diseases.
Cat fleas are found throughout the United States and the rest of the world. Adults about 1/8". Wings lacking. Body laterally flattened (side to side). Color brownish black to black. Females lay 4-8 eggs after each blood meal, laying some 400-500 during their lifetime. Eggs are oval, whitish, and about 1/64" long. They usually hatch in 1-12 days. Flea larvae feed on organic debris but almost all require dried fecal blood in order to complete development; they do not bite but feed on adult flea fecal blood. Larvae require high relative humidity (45-95║:.) Adults usually begin to seek a blood meal on the second day after emergence, but can live for several months on stored body fat. Once on a host, they tend to spend all of their time on the host, feeding, mating, and laying eggs, unless dislodged. Although they have a preferred host, they will readily bite people and can survive using other species as hosts. Depending on conditions, they can survive up to a year. It is not necessary to have pets in the building in order to have fleas present.

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