Members of the Melanoplus tribulus species group are flightless grasshoppers that inhabit open forests and forest edges throughout a large portion of the eastern United States. Here distributional, habitat, and morphological information is provided for several species of the group from the southeastern United States, including Melanoplus morsei, Melanoplus tepidus, and Melanoplus vulnus. Two new species, Melanoplus harrisi and Melanoplus nossi are described.

Caenodelphax Fennah was reviewed with reference to putatively allied species in the polyphyletic genus Delphacodes Fieber. Phylogenetic analyses using maximum parsimony of 34 morphological features for 15 ingroup and 3 outgroup taxa found that Caenodelphax sensu stricto did not group with putatively allied Delphacodes. Caenodelphax is here redefined as monotypic, and Flavoclypeus new genus is described to accommodate a clade of 8 species (6 transferred from Delphacodes and 2 transferred from Caenodelphax). Caenodelphax philyra was found to be a junior subjective synonym of Caenodelphax teapae.

The genus-group name Chermes Linnaeus 1758 has been suppressed, but an accounting of the various nominal species described in combination with it has not been presented until now. Nominal species of Chermes are found in 13 families of three major lineages of Sternorrhyncha (Aphidomorpha, Coccoidea, Psylloidea). Eleven available names remain unplaceable (incertae sedis nomina dubia) and to date do not appear in the various Sternorrhyncha catalogues. In order to clarify their status, we here present an annotated list of the 137 nominal species-group names originally described in combination with Chermes. We provide the original bibliographic citation and an assessment of the current status of each name.

More than 230 species of benthic macroinvertebrates are recorded from Kentucky Lake, a major reservoir on the Tennessee River system, and compiled in an annotated list. Chironomidae (Diptera) and Unionidae (mussels) comprise more than 60% of the total taxa. Most species are restricted to shallow or marginal areas of the lake with only about 12 being common everywhere. The common species were similar to those found in both large and small reservoirs in the eastern United States. High disturbance regimes and sedimentation patterns are thought to control the similarities, limiting the communities to a small suite of adaptable species. This may reduce the usefulness of reservoirs in understanding climate change. A small number of invasive benthic species are well-established but appear to have had little affect on the rest of the benthic community. Invasive zooplankton and fish seem to have had little influence on the benthos, but the recent invasion of silver carp, Hypophthalmichthys molitrix (Valenciennes), may be a tipping point.

The species of the genus Hybos Meigen from Tibet are reviewed. The following seven species are described as new to science: Hybos beibenganus sp. nov., Hybos brevifurcatus sp. nov., Hybos curvus sp. nov., Hybos hanmianus sp. nov., Hybos lihuae sp. nov., Hybos nigripes sp. nov., and Hybos beibenganus sp. nov. A key to the species of the genus Hybos from Tibet is presented for the first time.

Previously only one species of the genus Chrysosoma Guérin-Méneville was described from Tibet. Here four Chrysosoma species are added to the fauna of Tibet. The following three new species are described: Chrysosoma furcatum sp. nov., Chrysosoma nyingchiense sp. nov. and Chrysosoma spinosum sp. nov. Both a key to the species of the genus Chrysosoma from Tibet and a key to the species of the genus from China are presented respectively.

We have described a new species of genus Aeropedellus from Mongolia. We collected the specimens from near the Tunamalnuur, Tsagaanuul Sum, Hovsgol Province, Mongolia. The diagnosis and the detail description of the species are provided in this paper.

A new Neotropical species of Trentepohlia (Mongoma) is described from Cuba. This is the first species of the subgenus from the West Indies, whereas the other four Trentepohlia spp. are from the subgenus Paramongoma. Notes on the phenology of this new species are provided. Also, we discuss the transfer of Trentepohlia suberrans Alexander, 1979 to Mongoma and provide a key for the identification of the three species of this subgenus present in the Neotropics.

Previously only two species of the genus Syneches were reported from Tibet. Here the following six species from Tibet are described as new to science: Syneches astigma sp. nov., Syneches distinctus sp. nov., Syneches flavicoxa sp. nov., Syneches flavitibia sp. nov., Syneches indistinctus sp. nov., and Syneches wangae sp. nov. A key to the species of the genus Syneches from Tibet is provided for the first time.

Two new species of Neoxabea and three new species of Oecanthus are described from Nicaragua: N. cerrojesusensis and N. ottei, O. belti, and O. symesi occur at higher elevations in the northern half of Nicaragua. A large population of O. bakeri was found in dry tropical forest west of Lake Nicaragua. The presence of O. allardi in Nicaragua is documented as the first record outside of the West Indies, and waveforms from the first known recordings of a singing male O. leptogrammus are provided. Keys are provided for Neoxabea and Oecanthus in Central America.

Six new species from Mesoamerica are described and illustrated into the formerly monotypic genus Parkana. These species are segregated into 3 subgenera, Parkana s.s. (bearing a large dorsal process on the aedeagus) consisting of 5 species, and a single species each in Furcoparca new subgenus (with the median processes of the pygofer formed into a large forked process), and Litoparca new subgenus (lacking both features, genitalia relatively simple, aedeagus bearing lateral teeth). The new species are P. (P.) mirasol, P. (P.) nigra, P. (P.) pallida, P. (P.) tres, P. (F.) chico (all from Mexico, except P. nigra also from Guatemala), and P. (L.) costa (Costa Rica). Keys are provided to subgenus and species. Parkana was previously known only from the type species (P. alata) from western United States. The diversity of Mesoamerican delphacid species is briefly discussed.

The grasshopper genus Philocleon, with six previously known species (nigrovittatus (Stal), spatulatus Roberts, anomalus Roberts, luceroae Fontana and Buzzetti, scudderi (Hebard), and ottei Fontana & Buzzetti), is revised to include the following eight new species: zygon, zima, illa, cledon, axiton, azumai, iropon, and erissa. The subspecies nigrovittatus spatulatus Roberts is raised to species status. The fourteen species are placed into the four following species groups: Anomalus group, Illa group, Nigrovittatus group, and Scudderi group.

Curculionidae (weevils) frequently are recognized as favoring moist environments and wetland vegetation. To better understand the relationship between wetland type and the presence of curculionid species, twenty-four isolated wetlands (previously characterized as marshes, savannas or forested swamps) were sampled. Seventeen genera and 27 species were identified. Indicator species analysis revealed an association between the genus Dirabius and marsh habitat. NMS (Non-Metric Multidimensional Scaling Ordination) found a significant 2-dimensional solution to abundance data. Auleutes nebulosus, Lissorhoptrus simplex, Notiodes laticollis, Rhinoncus longulus, Sphenophorus minimus, and an unidentified species of Dirabius and Listronotus were associated with marshes. Swamps were characterized by their absence of Curculionidae. Savannas were intermediate between marshes and swamps. Marshes, with their diversity of vascular plants, appear to provide more suitable habitat and possess characteristics that allow curculionid populations to persist in the landscape.

The genus Aptenopedes Scudder is revised. Two new related genera, Floritettix and Floridacris are described. Twentysix species are mapped and illustrated. Aptenopedes now encompases nine species of which five are new. Seven species or subspecies formerly included in Aptenopedes are here placed into the new genus Floritettix. Four taxa treated as subspecies of Aptenopedes aptera (borealis, coquinae, saturiba and simplex) are raised to species rank and placed in Floritettix. Two taxa treated as subspecies of Aptenopedes sphenarioides (appalachee and clara) are raised to species rank. Three new species and Aptenopedes robusta are assigned to the new genus Floridacris.

The genera Eneremius SAUSSURE, Lithidium UVAROV and Lithidiopsis DIRSH are revised. Lithidium becomes a junior synonym of Eneremius. Eneremius includes seven species previously described (some under Lithidium) and 12 new species. Lithidiopsis includes two previously described species (one under Lithidium) and two new species. A new genus Tsautettix, in the the Lentulidae, is erected to include one species previously placed under Eneremius (namaquensis BROWN), and ten new species. The new genus Tanquata, also in the Lentulidae, is erected to include two new species from Tanqua Karoo.

Leatettix is a genus of small bush-dwelling grasshoppers known from the fynbos region of the Cape Province. They are distributed north through Namaqualand. One species is from near Aus, in Namibia. Four species in this genus were previously known, one as Namatettix denticornis. Twenty-nine new species are described here.