New distribution and host records for Hectopsylla pulex Haller (Siphonaptera, Tungidae) with notes on biology and morphology.

Hectopsylla pulex Haller is documented for the first time from Cochise County, Arizona on the Lesser Long-nosed bat, Leptonycteris yerbabuenae Martinez and Villa (Phyllostomidae). This represents the first record of this flea on this Chiropteran Family. The most favorable site of attachment of H.