Discipline: Veterinary Medicine
Two species of Haemoproteus, H. noctuae Celli & Sanfelice, 1891 and H. syrnii (Mayer & Keysselitz, 1909) Bishop & Bennett, 1989 and a new species of Acanthocephala, Pseudolueheia tongsoni are reported from the Philippine scops-owl, Otus megalotis megalotis (Walden, 1875). The gametogenic stages of H. noctuae and H. syrnii were demonstrated from the peripheral blood of live birds through examination of stained blood smears (bema-quick stain set). Both species are recorded for the first time from this bird host constituting a new host record for the species and further the Philippines is a new locality record for the latter species. Both Haemoproteus are briefly described and illustrated by microphotographs based on the Philippine specimens including morphological changes in the infected red blood cells. Pseudolueheia tongsoni was recovered from the intestine at necropsy, processed and stained in aceto-alum-carmine, cleared in terpineol and mounted in Canada balsam for microscopic examination. It is described and illustrated by drawings and photomicrographs. It is characterized by the proboscis armed with 27 -28longitudinal rows of 10-11 hooks, the cement glands emanating at a distance from the posterior testis and not close to it and absence of anterior manubrium of the small hooks of the proboscis, a relatively muscular male bursa with rays and an irregular outline of the posterior end in the female. It is differentiated from the closely related species of the genus Pseudolueheia Schmidt and Kuntz, 1967. The possible effects of these parasites on the host are discussed.