Summary. Works dealing with the association of searabaeid beetles and mesostigmatic mites are shortly reviewed. In the present paper the mite fauna of 106 specimens of Copris hispanus (Scarabaeidae) is investigated. A total of 3732 mites was collected, belonging to 17 species (10 genera, 6 families). The following species are described (or redescribed) and figured: Parasitus coleoptratorum (L.) Berlese, 1906; Parasitus copridis n. sp.; Parasitus hyper‐setosus n. sp,; Pachylaelaps hispani Berlese, 1908; Proctolaelaps parascolyti n. sp.; Alliphis halleri (G. & R. Can., 1881); Alliphis gurei n. sp. The degree of specifity of the mite‐beetle association is discussed. It is suggested that there is some relation between the social organization of the beetles and the degree of mite infestation, comparable to the mite‐hymenoptera association.

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1. The dorsal plate which probably represents a rudimentary scutum in some Argasid larvae is discussed and described.2. The respiratory system of the larvae of some species of Argas and Ornithodorus is described.3. The systematic position of the lahorensis group of the genus Ornithodorus is discussed and the use of the name Alveonasus with an emended diagnosis for this group is suggested.4. Ornithodorus procaviae n.sp. is described. Two other probably new species are described provisionally, but not named.5. New records for other species of Argasidae in Israel are given.

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