Chaetotaxy of fourth instar larvae of four Phlebotomus (Diptera : Psychodidae) sandflies species from Jordan

The morphological characteristics of the larval stages of four laboratory-r eared Phlebotomus species, collected from Jordan, were studied. The length, shape and distribution of body hairs of the fourth larval instar (L-4) of P. syriacus, P. mascittii, P. kazeruni and P. tobbi formed a pattern that c an distinguish one species from another P. tobbi possessed a single pair of caudal bristles. Distinctive chaetotactic features of Lq instars of the de scribed four species were compared to those of P. langeroni.