The Pselaphidae (Coleoptera) of Latimer County, Oklahoma, with Revisions of Four Genera from Eastern North America. Part 1. Faroninae and Euplectinae

The species of Pselaphidae found in Latimer County, Oklahoma, in the subfamilies Faron inae (1 genus, 1 species) and Euplectinae (14 genera, 31 species) are listed, and their seasonality and biology discussed. Four genera are revised (Rhexius LeConte, Thesiastes Casey, Biblo plectus Reitter, Melba Casey), and two others {Trimioplectus Brendel, Pygmactium Schuster & Grigarick) have keys provided for the first time. Species collected in Latimer County are: Mayetia domestica Schuster, Marsh & Park, Conoplectus canaliculatus (LeConte), C. susae Carlton, Rhexius stephani n. sp., R. ferrugineus Casey, R. insculptus Casey, R. schmitti Bren del, R. ouachitan. sp., Thesium cavifrons (LeConte), Thesiastes fossulatus (Brendel), T. atra tus Casey, T. pumilis (LeConte), Euplectus acomanus Casey, E. confluens (LeConte), Pyc noplectus interruptus (LeConte), P. linearis (LeConte), P. spinifer Casey, Saxet decora (Casey), Trimioplectus australis n. sp., Bibloplectus ruficeps (LeConte), B. choctaw n. sp., B. creek n. sp., B. cherokee n. sp., B. osage n. sp., B. chickasaw n. sp., Dalmosella tenais Casey, Melba thoracica (Brendel), M. p?rvula (LeConte), M. sulcatula Casey, Trimiomelba dubia (LeConte), Pygmactium quercavum n. sp., Sebaga ocampi Park. Species covered or figured that were not collected in Latimer County are: Rhexius substriatus Casey, Thesiastes debilis (LeConte), Tri mioplectus obsoletus Brendel, T. auerbachi Park, Bibloplectus leviceps Casey, B. integer (LeConte), B. sobrinus Casey, Melba maja (Brendel), Pygmactium steevesi Schuster & Gri garick, P. mollyae (Park). A number of new synonymies were discovered: Rhexius substriatus LeConte ( = R. virginicus Casey), R. ferrugineus Casey ( = R. transversus Casey, =R. ruber Casey), R. schmitti Brendel ( = R. hirsutus Casey), Thesium cavifrons (LeConte) (= Thesium laticolle Casey), Thesiastes fossulatus (Brendel) ( = E. rotundicollis Brendel), T. debilis (LeConte) ( = E. planipennis Bren del), Trimium brevicorne (Reichenbach) ( = T. discolor LeConte, apparent mislabeled Euro pean specimen), Melba p?rvula (LeConte) ( = T. durum Brendel, = T. gr?cil is Brendel, = T. laticolle Brendel, = Melba texana Casey, =M. uniformis Casey), M. sulcatula Casey ( = M. fossiger Casey, = M. dentipes Raff ray) NEW SYNONYMIES. Trimium americanum LeConte is transferred to Trimiomelba (NEW COMBINATION), and Rhexius simplex Motschulsky, Bibloplectus exilis Bowman, and Melba simplex (LeConte) are placed as Incertae sedis (NEW STATUS). Sebaga ocampi Park is the first member of the Neotropical tribe Jubini recorded from North America. Work on the North American Pselaphidae has usually dealt with generic or higher level treatments of selected groups, or consisted of descriptions of a variety of species from wide geographic areas. Only a few papers have dealt with species richness of Pselaphidae at local sites for prairie (Park et al 1949, 5 spp.), tree holes (Park et al 1950, 12 spp.), and sphagnum bogs 'Scientific Contribution Number 1613 from the New Hampshire Agricultural Experiment Station