Lutzomyia derelicta (Diptera : Psychodidae) a singular new phlebotomine sand fly from an inselberg in northeastern Amazonia

Lutzomyia derelicta n. sp. is described from specimens collected in a isola ted xeric habitat in the rainforest in the north of the State of Para. Braz il. The new species lacks the posterior bulge in the dorsal wall of the cib arium characteristic of the New World genus Lutzomyia, and the armature of the male genitalia is of the pattern found elsewhere only in the Old World species of Sergentomyia, L. derelicta is phenetically intermediate between the known species of Lutzomyia and Sergentomyia, and cannot readily be plac ed in any existing subgenus or species group of either genus.