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

Head end oval, with three rounded lips and four submedial papillae. The inner papillär ring consist of four small papillae. Body length 3.30-3.50 mm, maximum width 0. 25 mm. Esophagus length 0.39-0.42 mm. Nerve ring 0.18-0.30 mm, excretory pore 0.56 mm and vulva 0.90 mm from head end. Tail length 0.30 mm. Eggs measure 0. 130-0. 140 x 0. 0370. 040 mm. It parasitizes in the small intestine of the Apodemus species. It was reported from Apodemus agrárius, A. flavicollis and A. sylvaticus by POPESCU et al. (1974). Fig. 15: Syphacia stroma (Linstow, 1884) A = Anterior end of female, en face view; B = Anterior end of female; C = Tail end of female, lateral view Aspiculuris tetraptera (Nitzsch, 1821) Hosts: Mus musculus, Apodemus flavicollis. - Location: small intestine. In Roumania it was known until now from Citellus citellus, Mus musculus spicilegus, Apodemus sylvaticus, Microtus agrestis, and M. arvalis. Gongylonema neoplasticum (Fibiger and Ditlevsen, 1914) Host: Apodemus flavicollis. - Location: stomach. In one and only host 1 female specimen were found. POPESCU et al. (1974) mention it from Mus musculus spicilegus, Apodemus flavicollis, A. sylvaticus, and Microtus arvalis. Rictularia proni Seurat, 1915 (Fig. 16) Hosts: Apodemus flavicollis, A. sylvaticus. - Location: small intestine. A few female specimens were found in the two host species. Based on the most important morphological features (1 esophagus tooth, 33 pairs of prevulvar spikes, total num-