1) Arthropod genus 2) Genus pulex 
Latin, meaning: the flea. 
Pulex is a genus of fleas. It comprises six species. One is the human flea (P. irritans), and the other five are confined to the Nearctic and Neotropical regions. ...
• (n.) A genus of parasitic insects including the fleas. See Flea.
(pu´leks) a genus of fleas, several species of which transmit the microorganism causing plague. Pulex irritans a widely distributed species, known as the human flea, which infests domestic animals as well as humans, and may act as an intermediate host of certain helminths.
Pu'lex noun [ Latin , a flea.] (Zoology) A genus of parasitic insects including the fleas. See Flea . 
Type: Term Pronunciation: pū′leks Definitions: 1. A genus of fleas (family Pulicidae, order Siphonaptera).
[n] - type genus of the Pulicidae
genus Pulex noun type genus of the Pulicidae
the flea.