Dr. Kassai Tibor szerk.: Parasitologia Hungarica 2. (Budapest, 1969)

The case number of the host species (Table 5) displays without need of explanation the extent of host specificity of the flea species. This relationship is not so evident from a study of the list of species found occurring together. Common occurrences of several flea species The coexistence of flea species on the same host individuals and in the nest materials is listed in Table 3. Most of the common occurrences were found in one or two instances only; those noted in three or more cases are worthy of special attention. Besides the number of cases,the significance of these common occurrences increases if they are found in more than one host species or in geographically remote localities. At present, the frequency of cases seems to be the most significant (Table 4). Table 4-4. táblázat. Frequency of Common Occurrences of Flea Species According to the Number of Species Bolhafajok együttes előfordulásának gyakorisága a talált fajok száma szerint Number of Different Common Occurrences Comprising 2 Species J 3 Species | 4 Species Különféle együttes előfordulások száma 2 faj 3 faj 4 faj 28 7 5 2 3 2 2 1 1 18 3 1 Frequency of Common Occurrences Együttes előfordulások gyakorisága 1 2 3 4 5 6 X 7 X X X 9 11