LEUCTRA KETAMENSIS, A NEW SPECIES OF LEUCTRIDAE FROM NORTHERN AFRICA (INSECTA, PLECOPTERA)

Leuctra ketamensis sp. n. is described from Northern Africa. This spec ies belongs to the Leuctra nigra group. The male is easily distinguish ed by a pair of characteristic sclerotized processes on abdominal terg ite VI, the absence of sclerotized processes on other tergites, the ab sence of the specillum and the presence of a complex paraproctal syste m; the female is distinguished by a subgenital plate split into two pa rts separated by a membranous area.