FAMILY CUCUJIDAE (Flat bark beetles) Y. Bousquet The cucujids currently include 30 species in Canada and Alaska. The adults are usually found under the bark of dead trees, in logs and decaying plant matter. Some species apparently feed on fungi and decaying matter, others prey on insects. Six of the species occurring in Canada, Cryptolestes ferrugineus, C. pusillus, C. turcicus, Ahasverus advena, Oryzaephilus surinamensis and O. mercator are associated with stored products; four of them are among the most serious pests in the country. Lawrence's concept (1982a) of the family is followed here. Many authors rank the Silvaninae as a distinct family. There is no modern taxonomic revision of the Cucujidae but a number of genera have recently been revised by Halstead and Thomas. AK (3); YK (1); NT (2); BC (15); AB (9); SK (8); MB (17); ON (27); PQ (24); NB (5); NS (4); PE (1); LB (1); NF (3); H (1); I (10) Subfamily CUCUJINAE Genus CUCUJUS Fabricius Porphyrus des Gozis C. clavipes clavipes Fabricius - - - - - - MB ON PQ - NS - - - C. clavipes puniceus Mannerheim AK - - BC AB SK MB - - - - - - - subnitens Schaeffer Genus PEDIACUS Shuckard P. depressus (Herbst)+ - - - BC - - - ON - - - - - - subglaber LeConte P. fuscus Erichson* AK YK NT BC AB SK MB ON PQ NB - - LB - planus LeConte subcarinatus Mannerheim Subfamily PASSANDRINAE Genus CATOGENUS Westwood C. rufus (Fabricius) - - - - - - - ON PQ - - - - - Subfamily LAEMOPHLOEINAE Genus PLACONOTUS MacLeay Silvanophloeus Sharp Key to New World species: Thomas (1984) P. zimmermanni (LeConte) - - - - - - MB ON PQ - - - - - apertus (Casey) illustris (Casey) sobrinus (Casey) Genus LAEMOPHLOEUS Dejean L. biguttatus (Say) - - - BC - SK MB ON PQ NB NS PE - NF bisignatus Guérin-Méneville L. fasciatus Melsheimer - - - - - - MB ON PQ - - - - - Genus CHARAPHLOEUS Casey C. adustus (LeConte) - - - - - - MB ON PQ - NS - - - C. convexulus (LeConte) - - - - - - - ON - - - - - - Genus CRYPTOLESTES Ganglbauer Key to New World species: Thomas (1988) C. ferrugineus (Stephens)+ - - - BC AB SK MB ON PQ - - - - NF C. punctatus (LeConte) - - - - - - - ON - - - - - - adumbratus Casey extricatus (Casey) geminatus (LeConte) C. pusillus (Schonherr)+ - - - BC - - MB ON PQ - - - - - longicornis (Mannerheim) minutus (Olivier) pauper (Sharp) testaceus (Stephens) C. turcicus (Grouvelle)+ - - - BC AB SK MB ON PQ - - - - - Genus LEPTOPHLOEUS Casey L. alternans (Erichson)(+) - - - BC - - - - PQ - - - - - Subfamily SILVANINAE Tribe Uleiotini Genus ULEIOTA Latreille Brontes Fabricius U. debilis (LeConte) - - - - - - MB ON PQ - - - - - U. dubia dubia (Fabricius) - - - - - - - ON PQ - - - - - denticulata Smith U. dubia truncata Motschulsky - - - BC - - - - - - - - - - Genus DENDROPHAGUS Schonherr D. cygnaei Mannerheim AK - - BC - - MB ON PQ - - - - NF americanus Mannerheim germari Mannerheim glaber LeConte Genus TELEPHANUS Erichson Heterodromia Haldeman T. velox Haldeman - - - - - - - ON PQ - - - - - Tribe Silvanini Genus SILVANUS Latreille Key to species: Halstead (1975) S. nitidulus LeConte - - - - AB - MB - - - - - - - S. planatus Germar - - - - AB - MB ON PQ - - - - - cognatus LeConte zimmermanni Guérin-Méneville S. bidentatus (Fabricius)+ - - - BC - - - ON PQ NB - - - - S. muticus Sharp - - - BC - - - ON PQ - - - - - Genus CATHARTOSILVANUS Grouvelle Key to species: Halstead (1975) C. imbellis (LeConte) - - NT - - - - ON PQ - - - - - C. fagi (Guérin-Méneville)+ - - - - - - - ON - - - - - - Genus AHASVERUS des Gozis A. advena (Waltl)+ - - - BC AB SK MB ON PQ - - - - - musaeorum (Ziegler) A. longulus (Blatchley) - - - - - - - ON PQ NB - - - - parviceps (Casey) Genus ORYZAEPHILUS Ganglbauer Key to species: Halstead (1980) O. surinamensis (Linné)+ - - - BC AB SK MB ON PQ - - - - - O. mercator (Fauvel)+ - - - BC AB SK MB ON PQ NB NS - - - Genus NAUSIBIUS Redtenbacher N. clavicornis (Kugelann)+ - - - - - - - ON PQ - - - - - .