Both Genuchinus ineptus (Horn) and Chlorixanthe propinqua (Gory and Percheron) (Cetoniinae) were collected in decaying sotol (Dasylirion spp., Agavaceae) after the initial rot had been started by invading individuals of Thrincopyge LeConte (Buprestidae). Illustrations of the plants and insect species involved are included.

Metabacetus hermani new species with type locality Vietnam, Hatinh Pr. is added to the six previously described in the rarely collected genus Metabacetus Bates (Carabidae: Abacetini (contained in Pterostichini auct.)). A key to adults, incorporating all species and subspecies of the genus is provided. Characteristics of the members of this genus and species of other genera, e.g., Tiferonia Darlington, Mateuellus Deuve, and Cosmodiscus Sloane and Abacetus Dejean, suggest that Metabacetus is a taxon in the basal grade of a clade including all of these genera. Metabacetus vandoesburgi Straneo is newly recorded from Sabah, Malaysia making it the only species in the genus known from outside its type locality.

Three instars of the tiger beetle Cosmodela batesi (Fleutiaux) are described and illustrated here for the first time. Differences between Cosmodela batesi and its allied Palearctic genera are discussed.

The formerly monotypic genus Nothotragopus Zimmerman is reviewed. The genus is likely endemic to the Indonesian island of Java, not Australia, as previously reported. Nothotragopus belongs to a group of Indo-Australian crowned weevil genera in Cryptorhynchini, subtribe Cryptorhynchina. In this paper, the genus is diagnosed and its close relationship with Panopides Pascoe is discussed. New male and female characters are described and illustrated for the first time for the genus. Nothotragopus tragopoides (Heller) new combination is transferred from Cyamobolus Schönherr. The syntypic series of this species was originally comprised of specimens belonging to three species, necessitating the designation of a lectotype and redescription of N. tragopoides. The remaining specimens of the syntypic series are divided between N. tuberosus (Boheman) and a new species described herein as N. zimmermani Setliff, new species.

Metaxina ornata Broun is a rare and poorly known beetle species now in the monotypic family Metaxinidae. We offer this initial report on its association with margarodid scale insects, Ultracoelostoma assimile (Maskell), and sooty mold on southern beech, Nothofagus solandri (Hook. f.) Oerst., in hopes of assisting others in gathering additional information on this phylogenetically interesting species that is restricted to New Zealand.

Cyclocephala acoma Ratcliffe (Bolivia), C. carlsoni Ratcliffe (French Guiana), C. chera Ratcliffe (Guyana), C. chiquitita Ratcliffe (Ecuador), C. compacta Ratcliffe (Brazil), C. hielkemaorum Ratcliffe (French Guiana), C. melanopoda Ratcliffe (Ecuador), C. monacha Ratcliffe (Colombia), C. perplexa Ratcliffe</emph> (Bolivia), and C. saltini Ratcliffe (Peru) are described as new species. A description, diagnosis, and illustrations are provided for each new species.

Odontocorynus Schönherr is reviewed and transferred from Madopterini, Zygobaridina to Madarini, Leptoschoinina (new placement). The included species occur from southern Canada to Costa Rica, but are absent on the Pacific side of the Rocky Mountains. Previous records from Brazil are rejected, and one collection from El Salvador is treated as suspect. Twelve known and four new species are recognized: O. calcarifer Prena new species [United States], O. creperus Boheman (type species; original designation), O. falsus (LeConte), O. histriculus Casey, O. larvatus (Boheman), O. latiscapus Champion, O. luteogramma Prena new species [Mexico], O. nunume Prena new species [Mexico], O. procerus Prena new species [Mexico], O. pulverulentus (Casey), O. salebrosus (Casey), O. subvittatus Casey, O. suturaflava Champion, O. tectus (Champion) new combination (from Geraeus Pascoe), O. townsendi (Casey) new combination (from Nicentrus Casey), and O. umbellae (Fabricius) new combination (from Baris Germar). Lectotypes are designated for O. falsus, O. larvatus, O. pulverulentus, O. salebrosus, and O. scutellumalbum (Say). The following new synonymies are proposed: O. creperus [ = O. limatulus, O. subglaber, O. vernicicollis (all Casey 1920)]; O. larvatus [ = Nicentrus contractus Casey 1892]; O. pulverulentus [ = O. coloradensis, O. densissimus, O. lulingensis (all Casey 1920)]; O. salebrosus [ = Centrinus denticornis, C. pinguescens (both Casey 1892), O. alternans, O. boonei, O. convergens, O. convexus, O. cribrum, O. dakotanus, O. dallasianus, O. defectus, O. greeleyi, O. ignotus, O. inflaticollis, O. inspectus, O. iowensis, O. latiusculus, O. longicollis, O. missourianus, O. ochreosus, O.

Spatial requirements of the enlarged stemmata of mature larvae of Thermonectus basillaris (Harris) and Acilius mediatus (Say) are described and evaluated. Each species exhibits a medial shift in the origin of the abductor muscles with corresponding changes in the orientation of the abductor apodemes to compensate for greater stemmatal volumes. These changes disrupt an apparent plesiomorphic biomechanical system responsible for opening the mandibles, requiring alterations in the basal mandibular architecture evident on these aciliine species.

The genus Eubulus is reviewed for the United States and Canada. Three species are recognized; E. parochus (Herbst), E. bisignatus (Say) and E. obliquefasciatus (Boheman), resurrected name. A neotype is designated for Eubulus bisignatus (Say). A key to the three species is presented and natural history information and distributions are summarized. Three additional specimens of Eubulus collected in North America, but not assigned to species, are discussed.

Eight species of blind, wingless, amauropine pselaphines in the genus Arianops are described and placed in established species groups: in the amplyoponica group, A. obrieni, new species (type locality, Tyler County, Texas); in the nantahala group, A. carteri, new species (type locality, Union County, South Carolina); in the henroti group, A. clintoni, new species (type locality, Monroe County, Alabama); in the cavernensis group, A. ashei, new species (type locality, Butler County, Alabama), A. barri, new species (type locality, Jackson County, Alabama), A. folkertsi, new species (type locality, Walker County, Alabama), A. gorei, new species (type locality, Grunday County, Tennessee), and A. hiltenae, new species (type locality, Blount County, Tennessee). These species bring the total diversity of the genus to 42 species and one subspecies. Distributional updates and collection notes are provided for A. digitata Barr, A. extera Barr, and A. unicoi Barr, and the taxonomic status of numerous undetermined specimens is discussed. A putative male internal sac protruding from a female specimen of A. alticola Barr is described and illustrated. The species taxonomy of the genus is judged to be incompletely known despite the relatively large number of described species.

Pitfall traps were employed to investigate the effects of post-fire salvage logging on abundance of pill beetles (Coleoptera: Byrrhidae) across an ecotone from unsalvaged habitat into the interior of a salvaged stand in the Canadian boreal forest. Byrrhids (mainly Byrrhus geminatus LeConte) were dramatically more abundant at the edge of salvaged habitat and more common in the salvage habitat relative to the unsalvaged stand. This holarctic beetle, herein reported for the first time from Alberta, is characteristic of disturbance, and its abundance appears to reflect a relative degree of disturbance over natural post-fire conditions.

The first descriptions of the larval stage of Myrmeanthrenus frontalis Armstrong and Anthrenocerus stigmacrophilus Armstrong (Coleoptera: Dermestidae) are presented. The larva of Anthrenocerus australis (Hope) is illustrated and briefly characterized. In light of a morphology-based phylogenetic study, A. stigmacrophilus is more closely related to M. frontalis than it is to A. australis.

This paper shows that juvenile nematodes inhabit a morphologically distinct region of the Malpighian tubule excretory organ in the neotropical mango bark beetle, Hypocryphalus mangiferae (Stebbing) (Coleoptera: Scolytidae). Under the scanning electron microscope the infested region appears as an enlarged pocket in the proximal region of the Malpighian tubule near its insertion into the digestive tract. Transmission electron microscopy demonstrated the pocket wall to be thin with a single layer of muscle, whereas in the rest of the Malpighian tubule wall there is a typical muscle layer and a simple epithelium adapted for excretion. Results suggest a phoretic other than entomopathogenic association between H. mangiferae and Aphelenchoididae.