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

C. cricetorum is a common parasite of Clethrionomys glareolus, it can also be found in other Microtinae species, however according to the latest studies (MAS-COMA et al., 1978) C. a

siatica Tenora et Murai, 1975 live in these species. The C. cricetorum specimens collected in the Retezat Mountains are identical with the specimens of the population of Hungary (MURAI, 1974), as far as theirmorphology is concerned. The specimen collected in M. nivalis did not contain ripe eggs, thus possible differences could not been evaluated. This was the first ever reporting on the occurrence of C. cricetorum in the territory of Roumania. Catenotaenia pusilla (Goeze, 1782) (Fig. lc-d) Host: Mus musculus spicilegus. - Location: small intestine. Length: 90 mm, maximum width 1.2 mm. Diameter of scolex 0.260 mm, of suckers 0.090 mm. Number of testes 70-75. Uterus with 11-12 lateral branches on eaijh side. Cirrus sac 0. 220 x 0. 055 mm. Seminal receptacle 0. 140 xO. 090 mm. E?fs ovoid 0. 024x0. 0 16 mm

. Oncosphere 0. 016x0. 011 mm. Fig. 2: Anoplocephaloides dentata G alii- Valerio, 1905 A = Scolex; B = Mature segments; C = Poral side of gravid segments C. pusilla is a cosmopolitan parasite of Mus musculus. From Roumania CHIRIAC and BARBU (1963), CHIRIAC and HAMAR (1966), POPESCU and BARBU (1971), and POPESCU et al. (1974) reported that beside Mus musculus it can also be found in the following hosts: Microtus arvalis, Apodemus agrárius, A. flavicollis, A. microps, A. sylvaticus, and A. tauricus; among these latter data probably C. cricetorum and Skrjabinotaenia lobata occurrences are hidden. Anoplocephaloides dentata G alii-Valerio, 1905 (Fig. 2 a-c) (Syn. : Paranoplocephala brevis Kirshenblat, 1938) Host: Microtus ägrestis. - Location: caecum. Body length 12 mm, maximum width 3.4 mm. Number of segments 55, of-them the latest 10 containing ripe eggs. Diameter of scolex 1. 100 mm, of suckers 0. 375. Number of