L. Forró szerk.: Miscellanea Zoologica Hungarica 7. 1992 (Budapest, 1992)

Matskási, I., Mészáros, F. , Murai, É.; Dudich, A.: On the parasite fauna of Microtus oeconomus Pallas, 1776 ssp. mehelyi Éhik, 1928 in Hungary (Trematoda, Cestoda, Nematoda, Siphonaptera)

B) External parasites of Microtus oeconomus mehelyi in Hungary Siphonaptera Hystrichopsyllidae Taschenberg, 1880 HystrichopsyUa o. orientális Smit, 1956 Locality: Fertőújlak, November 1987 (1 female). Ctenophthalmus agyrtes bosniens Wagner, 1936 Localities: Kis-Balaton, March 1982 (1 male), Fertőújlak, November 1987 (1 male and 2 females), Hanság Fehértó, March 1988 (2 males and 5 females). Ctenophthalmus agyrtes agyrtes (Heller, 1896) Localities: Lipót Macska-sziget, June 1987 (1 female), Győrladamér, May 1987 (2 females). Ctenophthalmus assimiüs (Taschenberg, 1880) Localities: Lipót Macska-sziget, June 1987 (1 male), Kisbajcs, June 1987 (2 males and 1 female), Fertőboz, November 1987 (2 males and 1 female). Peromyscopsylla bidentata (Kolenati, 1860) Locality: Királytó, March 1988 (1 male). Ceratophyllidae Rothschild, 1907 Megabothris walked (Rothschild, 1902) Localities: Lipót Macska-sziget, June 1987 (1 male), Kisbajcs, June 1987 (3 males and 1 female), Fertőboz, November 1987 (1 felame), Fertőújlak, November 1987 (1 female), Hanság Fehértó, March 1988 (1 female). Notes: Szabó (1969, 1975) recorded from the Kis-Balaton sample (33 host specimens examined in December 1964) the occurrence of HystrichopsyUa t. orientális (2 cases), Ctenophthalmus agyrtes bosnicus (3 cases), Ctenophthalmus assimilis (1 case), and Megabothris walkeri (2 cases) as external parasites of Microtus oeconomus mehelyi. Ctenophthalmus agyrtes agyrtes and Peromyscopsylla bidentata are new parasites for M. oeconomus in Hungary. Discussion Among the 84 Microtus oeconomus mehelyi individuals, collected in Hungary 50 (58 per cent) specimens were infested with helminths. As concerns the internal parasites of M. oeconomus the following is worth noting: 1, The number of parasitic worms found in host species was between 1-96, depending on individuals. 2, Our data correspond to observations concerning worm-infectedness of rodents. 3, Parasite composition of Méhely's root-vole proved very simple in comparison with other microtid species found in Hungary (Matskási 1974, Mészáros 1977, 1978, Murai 1974, Tenora et al. 1973). 4, All the identified helminths of M. oeconomus mehelyi are usually found in other microtids (Table 1).