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

nest no. 65-0823-5; 1 ex. (Paratype): 69-0404-8a: as above, 19 August, 1965; nest no. 65-0727-1The holotype and 3 paratypes are deposited in the Cornell Collection, Cornell University, Ithaca, N.Y., all other paratypes in the Zoological Department of the Hungarian Natural History Museum, Budapest, Hungary. Remarks: According to Dr. C. EICKWORT's communication, „the mites were... phoretic on adult female bees, Dialictus umbripennis (Ellis) (Hymenoptera

: Halictidae

)"... and they „cling principally to the hairs of the venter, especially metasomal (gastral) segment 1 and about the coxae. Mites were also found in the nest cells of these bees." The relegation of the mite to the genus Imparipes is quite easy, but the correct assignment as to subgenus is difficult. The structure of leg IV is very similar to that of I. (I.) intermissus Kar., 1959, the basal section of the tarsus being slightly elongated, but this is not followed by the same modification of either its other parts or the other leg joints. Therefore I could only assign it, along with intermissus Kar.,to the nominate subgenus Imparipe

s

. Here, the new species differs strikingly from its subcongeners, since none of them are known to possess similar penicillate dorsal setae.The anterior angle of the posterior sternal plate is also characteristically and uniquely widened. MAHUNKA, S.: Imparipes (I.) eickworii sp. n. (Acari, Tarsonemina) Dialictus umbrípennis (Hym.)-ről A szerző egy tudományra nézve uj Imparipes fajt ir le, amelyet Dialictus umbripennis Ellis nevü, Costa Ricá-ban élő méhfaj szőrzetéről és fészkéből gyűjtöttek. Az Imparipes genus eddig ismert fajai nagyrészt apró futrinkákról és hangyafészkekből ismertek. Ez az első faj, mely méhféléken fordul elő. A most leirt és a már ismert fajok között nagyok a morfológiai különbségek is.