The genus Adelomyrmex is a group of myrmecine ants, occurring primarily in rotten wood and leaf litter of tropical rain and cloud forests. In this paper, we describe Adelomyrmex dorae sp. nov. Garcia-Martinez 2017 based on several morphological characters assessed by a parsimony analysis. Based on morphology, A. dorae may be recognized by the smooth and shiny spots on the genae and the slightly sinuous but somewhat longitudinally oriented rugae on the lateral and dorsal faces of the pronotum. We sampled several habitats in central Veracruz, including tropical montane cloud forest fragments, coffee plantations, cattle pastures and human settlements. This species seems restricted to remnants of riparian vegetation. Although Mexico has a relatively well-known myrmecofauna, the sampling of ecologically important ecosystems, such as riparian remnants, could result in the discovery of new species.

Strumigenys lanuginosa Wheeler is a small, inconspicuous New World ant (Hymenoptera, Formicidae). After being described in 1905 from two sites in the Bahamas, there were no additional published records of this species for more than 50 years. Reports of S. lanuginosa in 1957 and 1961 from Costa Rica, Mexico, and Panama, however, suggested that this species may be native to Central America. Here, I compiled and mapped published and unpublished S. lanuginosa records from >160 sites. I documented the earliest known records for 16 geographic areas (countries and US states), including five for which I found no previously published records : Belize, Dominican Republic, El Salvador, Honduras, Jamaica, and Nicaragua. Strumigenys lanuginosa appears to be native to Central America (where it is known from every country) and possibly northern South America (where it is known from Colombia, Venezuela, and French Guiana). Past researchers proposed that S. lanuginosa populations in the Bahamas and Florida were probably exotic, no doubt based on the large gap between these populations and the species' presumed native range in Central America. The discovery of S. lanuginosa populations in Cuba, the Dominican Republic, and Jamaica, however, raises the possibility that S. lanuginosa may have continuous native populations across the Greater Antilles and into Florida and the Bahamas.

The William H. Cross Expedition is an endowed collecting trip conducted annually by the Mississippi Entomological Museum. This year's expedition was held from 19 to 24 June 2017 at the Ouachita Mountains Biological Station (OMBS) in Polk County, Arkansas. We focused our collecting efforts on the mountainous Ouachita Mountains Biological Station, but we also collected at various sites within the Ouachita National Forest, at Queen Wilhelmina State Park, Big Fork Creek Natural Area, and Stone Road Glade Natural Area. During a five-day period, we collected 63 ant species, including five not previously reported for Arkansas: Brachyponera chinensis (Emery), Hypoponera inexorata (Wheeler), Strumigenys creightoni Smith, Syscia augustae Wheeler, and Temnothorax longispinosus (Roger).

No Diaphorinae were known to occur in Shandong of China before. Here, two species of Chrysotus and one species of Diaphorus are described as new to science: Chrysotus bicercusi Liu & Yang, sp. nov., Chrysotus hypnususi Liu & Yang, sp. nov., Diaphorus hadesusi Liu & Yang, sp. nov. While two species, Chrysotus liui Wang et Yang, 2008 and Chrysotus shanxiensis Liu et Yang, 2015 are recorded from Shandong for the first time. A key to the species of Diaphorinae from Shandong is presented.

Trinidad and Tobago are continental shelf islands, connected with South America when ocean levels were lower during glacial maxima. Trinidad became isolated from South America only ∼1.5 kya and Tobago became isolated ∼12 kya. Because of this former connection, these islands have many South American species not found on islands of the Lesser Antilles that were never connected to South America. I collected nine species of acrobat ants (Crematogaster) in Trinidad and Tobago: Crematogaster brasiliensis, Crematogaster carinata, Crematogaster crinosa, Crematogaster crucis, Crematogaster curvispinosa, Crematogaster limata, Crematogaster nigropilosa, Crematogaster rochai, and Crematogaster tenuicula. All these species have broad ranges in South and Central America. Only two, C. crinosa and C. curvispinosa, are also known from multiple islands of the Lesser Antilles north of Trinidad and Tobago.

The leaf beetle, Ambrostoma quadriimpressum Motschulsky (Coleoptera: Chrysomelidae) is the predominant pest of elms (Rosales: Ulmaceae) in China, Russia, and elsewhere in northesatern Asia, where it feeds on buds and leaves of several elm trees (Ulmaceae) and inhibits elm trees sprouting, severely affects elm trees growth and eventually leads to mortality. The present study aimed to elucidate the insect-plant and insect-insect chemical communication mechanisms involved with this process by observing the antennae and sensilla of A. quadriimpressum using scanning electron microscopy. The filiform antennae of both sexes of the both species consist of the scape, pedicel, and nine flagellomeres. Based on their morphology, 3 types of sensilla chaetica, 2 type of sensilla trichodea, 2 types of sensilla basiconica and Böhm bristles were distinguished on the antennae in both sexes. No sexual dimorphism was observed in the distribution and types of sensilla. SC1, ST1 and ST2 are distributed throughout the antennae. SB1 and SB2 are absent from the scape, pedicel and the first 3 flagellum. SC2 and SC3 are located on the antennal flagellum. BB only occur on the scape and pedicel. ST1 and ST2 are more abundant than the other types of sensilla on the antennae. The distal antennal sensilla of A. quadriimpressum had notably more sensilla than proximal ones in type and number, indicating this is the main area to detect environmental stimuli for feeding or oviposition The putative functions of other sensilla types were also discussed with reference to their morphology, distribution, and ultrastructure.

A total of 605 species of leafhoppers, including 38 exotics, are documented for New Hampshire. Nine additional species are included that were taken 1–16 km from the NH border in Maine, Massachusetts, and Vermont. There are 287 new records for the state of which Empoasca vitis (Göthe) is new for the Nearctic region, and two others are new for the USA: Idiocerus albolinea Hamilton, here recorded also from Montana, and Gyponana quebecensis Provancher, also newly recorded from Illinois, Maine, Montana, Utah, and Vermont. Six new state records are documented for Massachusetts, and eight additional new state records for Maine. Eight species are here described in Typhlocybinae by Chandler: Dikrella scimitar, Empoasca kittelbergeri, Empoasca murrayi, Eratoneura hampshirensis, Erythridula bassorum, Erythridula morsei, Erythroneura confusa, Erythroneura viridis; and six by Hamilton in the other subfamilies: Chlorotettix smodix, Jikradia brikelos, Gyponana castor, Gyponana pollex, Macrosteles hizemus, and Macrosteles wahnapitae (new species). Oncopsis ferrosa Hamilton, 1983 is raised from subspecies to species (new status). Erythroneura alternata Johnson, 1935a (now in genus Erythridula) is recognized as the senior synonym of Erythroneura cauta Johnson, 1935b, synonymy reversed based on precedence of publication date (revised synonymy); five junior synomyns of Xestocephalus desertorum (Berg) are raised from synonomy: X. brunneus Van Duzee, X. fulvocapitatus Van Duzee, X. nigrifrons Osborn, X. similis Peters, and X . superbus (Provancher) (revised status); a junior synonym of Penthimia americana Fitch, 1851, P. vicaria Walker, 1851 is removed from synonymy and placed as a subspecies of P. americana (new status); Empoasca pergandei Gillette, 1898 is placed in Kyboasca Zakhvatkin (new combination).

Specimen data are given, as well as summaries of the collection data and seasonality of the adults. Species richness is highest in habitats based on sandy soils such as eskers and glacial outwash plains. A list of leafhopper (Cicadellidae) species erroneously attributed to New Hampshire is provided, as is a list of the leafhopper species occurring in the surrounding states and the adjacent Atlantic Maritime Ecozone of Quebec that have not yet been taken in New Hampshire. A comparison of the collecting techniques used for sampling species in New Hampshire agroecosystems support the use of multiple collecting techniques for biodiversity studies, such as sweeping, pan traps, and sticky traps, as each produced species not taken by the other techniques. Yellow traps were the most attractive to the largest number of species, with green comparable for some of these species. Red and blue pan traps were often the most attractive to species that feed at ground level and do not readily fly. The plant hosts of the New Hampshire species are also provided with a list of the species that feed on them. COI barcodes are used to investigate species complexes of Draeculacephala, Jikradia, and Penthimia.

Additional distribution records and habitat information is presented for Melanoplus nossi. Based on the information currently available, M. nossi appears to be endemic to the North American Coastal Plain where it inhabits a variety of open forest or woodland conditions.