Mallophagan parasites from Indian birds - Part V. Species belonging to the genus Ibidoecus Cummings, 1916 (Ischnocara)

Four species of Ibidoecus occurring on Indian ibises (family Threskiornithidae) have been reported. Of these, denelli sp. n. from Pseudibis papillosa has been described in full and the remaining three, clausus (Giebel), bisignatus (Nitzsch) and plataleae (Denny), have been redescribed. In addition onw species, Ibidoecus robustus Qadri, was described without host and has here been placed as a synonym of I. clausus (Giebel). Some remarks on the difference between plataleae, a parasite of the spoonbill (subfamily Plataleinae), and the remaining species, all from ibises (subfamily Threskiornithinae), are included. A key to these species is given.