Dr. Murai Éva szerk.: Parasitologia Hungarica 14. (Budapest, 1982)

New data to the knowledge of the tarsonemids (Acari) living on bark beetles Dr. Sándor M A H UNKA — Dr. John C. MOSER Department of Zoology, Hungarian Natural History Museum, Budapest, Hungary — Southern Forest Experimental Station, U.S. Forest Service, Pineville, U.S.A. "New data to the knowledge of the tarsonemids (Acari) living on bark beetles" - Mahunka, S. - Moser, J.C.Parasit, hung. 14: 87-89. 1981-82. ABSTRACT. Pseudopygmephorus bogenschutzi sp. n. and two other Pygmephoridae species living on bark beetles (Coleoptera: Ipldae) are given from Germany. In an earlier short publication we have published one new Scutacarus species (Scutacarus scolyti Mahunka et Moser, 1980) from bark beetles which had been studied by the junior author and Dr. H. BOGENSCHÜTZ (Freiburg, Germany). Newly was collected by them are some Tarsonemid specimens belonging to three species of the family Pygmephoridae. One of the species proved to be new to science, the connection of the other two with bark beetles was so far known. Bakerdania hylophila (Cooremann, 1963) Until now known only from Germany and Hungary. Locality and host: Freiburg, Ips typographus ex. pheromone trap. 9. VI. 1980. Elattoma karafiati (Krczal, 1959) So far known only from Germany and Hungary. Locality and host: Freiburg, Germany, 11. VI. 1980. ex. Trypodendron lineatum. Pseudopygmephorus bogenschutzi sp. n. All examined specimens have been prepared in Hoyer-fluid, they nevertheless were in good condition, though only approximative measurements could be taken: length: 245-265 (wi, width: 150-160 |im. Dorsal side (Fig. 1): Peritrema small, drop-shaped. Exobothridial setae slightly longer than the sensillus, interbothridial setae thin and minute. Head of sensillus graudally dilated, elongated. All hysterosoma setae - excepting ps^-ps^ - dagger-shaped, strong, weakly ciliated. Setae f short, the others nearly equal in length, hj situated far from hg, but the distance between h^ and hg merely half as long as the distance between setae hj~hj. Setae of Ps segment very short and thin, ps^ slightly shorten than the other two pairs. Ventral side (Fig. 2): Epimeral region well chitinized, apodemes thick. Among them ap. sec. also well visible, ap. sa. with a knob-shaped thickening, ap. 4 long, but not reaching to the lateral margin of the posterior sternal plates. Epimeral setae thin, 2a longer than 2b. On the posterior sternal plate only 4 pairs of epimeral setae present, 3b and 4b completely reduced.