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Two new genera of cavernicolous Hydrometridae are described from limestone caves in northeastern Brazil: Spelaeometra n. gen… Expand Hydrometra sapiranga sp. nov. is described, illustrated, and compared with similar species. An identification key to the species… Expand Baptista vetai sp.n. is described from a Baltic amber inclusion. Its systematic position is surprising, because the new species… Expand New species of two hitherto monotypic genera of water striders are described from Baltic amber inclusions: Metrocephala schaeferi… Expand This study was based on 1627 specimens belonging to 12 species and 1 subspecies of 8 genera in 7 families of the infraorders… Expand The water measurers Hydrometra chaweewanae Sites and Polhemus and Hydrometra akekawati Sites and Polhemus are described and… Expand A new Hydrometridae species, Hydrometra quadrispina, is described here. The most distinctive characteristics are: Male VIIIth… Expand Two new species of terrestrial Hydrometra, H. phytophila and H. cavernicola, are described from the rain forests of Mt. d'Ambre… Expand T';;<enty-six species in five families of semi aquatic Hemiptera were collected in Wis ':0Dsrn and as many as four more may… Expand This study is based on material collected by Dr. P. H. van Doesburg Jr. in Suriname and by other workers during investigations… Expand