Dr. Murai Éva szerk.: Parasitologia Hungarica 12. (Budapest, 1979)

RETTE-DESSET (1971), and the propagation data by MÉSZÁROS (1977). Syphacia nigeriana Hay lis, 1928 Host: Microtus arvalis. - Location: caecum. In one and only field-vole 2 female specimens were found. Description and propagation data of this species are given by 'FEMORA and MÉSZÁROS (1975), and MÉSZÁROS (1977). Fig. 12: Boreostrongylus minutus (Dujardin, 1845) Bursa copulatrix Syphacia muris (Yamaguti, 1935) (Fig. 13) Host: Rattus norvegicus. - Location: caecum. Only young female specimens were found. Head end square-shaped, papillae "pedicled" amphides are ventrally located. Body length 1.74-1.77 mm, maximum width 0.18-0.19 mm. Esophagus length 0. 38-0. 29 mm. Nerve £ 3 o Fig. 13: Syphacia muris (Yamaguti, 1935) Anterior end of female, en face view ring 0. 096 mm, vulva 0. 46 mm from head end. Tail length 0. 40-0. 42 mm. S. muris is a parasite of Rattus species. CHIRIAC and HAMAR (1966), POPESCU and BARBU (1971), POPESCU et al. (1974) report S. obvelata from Rattus rattus and from R. norvegicus.