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

Imparipes (L) eickworti sp. n., a New Seutacarid Mite (Acari, Tarsonemina) from Dialictus umbripennis Ellis (Hym.) Dr. Sándor MAHUNKA Zoological Department of the Hungarian Natural History Museum, Budapest In Costa Rica Dr. C. EICKWORT collected specimens of an Impari pes species from the hairs of the bee Dialictus umbripennis Ellis. Believing the specimens to represent a new species, Dr. EICKWORT kindly sent the mites to me for a more thorough examination. They proved to be unquestionably new for science, and I have the honour to dedicate the species to its collector as Imparipes (I.) eickworti sp. n. Length: 179-224 A, breadth: 124-166 Dorsal side (Pig. 1): Clypeus large, its margin wide. All dorsal hairs intensely and penicillately ciliate, except for exterior lumbal and exterior sacral setae. No striking difference in size; humeral hairs longest of all, interior pair arising anteriorly to exterior pair. Setae dorsales, setae lumbales internae and setae feacrales internae decreasing in length in this sequence; exterior lumbal and exterior sacral hairs essentially thinner and more weakly ciliate, their length agreeing with that of interior lumbal hairs. Ventral side (Fig. 2): Hairs arising on anterior sternal plate short and, except for setae coxales II externae, all ci-