Two new species, Chlorosema lemmerae, sp. n., and Rosema veachi, sp. n., are described and illustrated from specimens collected at Serra Bonita Reserve, Bahia, Brazil. The new species continue to underscore the high conservation value of the Atlantic Forest of Brazil.

Sixteen species of scorpionflies have been reported from Vietnam, consisting of 13 Neopanorpa and three Bittacus species. One of these scorpionflies from the Central Highlands of Vietnam with hood-shaped hypovalves was determined to be a new species and is described herein as Neopanorpa cucullata, n.sp. A second new species, Neopanorpa ellengreeni, n. sp., with golden yellow wing membranes and Y-shaped wing markings is described from northern Vietnam. COI DNA analysis of 16 of 17 species of Vietnamese Mecoptera are presented using a neighbor-joining tree indicating that the new species are approximately as distinct from the extant species as the extant species are from each other. A key is provided for all 17 Vietnamese Mecoptera.

Heteroplea is a Neotropical genus of Pleidae that is easily separated from other members of the family by having a distinct raised callus on the dorsal posterior of the head and sharing a 3,3,3 tarsal formula with the Palearctic genus Plea. Heteroplea acanthoscelis, n. sp. is described and can be differentiated from all other species of Pleidae in having raptorial spines on its prothoracic tibia, with smaller, similar spines on the mesothoracic tibia. With this description, H. acanthoscelis n. sp. becomes the second member of this genus; both species are currently known only from Venezuela.

Biological and distributional data are reviewed for the Nearctic species of Metallus Forbes (Hymenoptera: Tenthredinidae), and new data are presented for each. Larvae of all four mine leaves of rosaceous plants. The introduced Palearctic species M. lanceolatus (Thomson) feeds on Geum L. and is multivoltine. The three native species feed on Rubus L. and are univoltine or bivoltine. Metallus capitalis (Norton) is found on raspberries across southern Canada and the northern US and is bivoltine. Metallus rohweri MacGillivray occurs on blackberries and dewberries in eastern North America; it is univoltine in Massachusetts, but previous studies indicate that it is bivoltine in New York and farther south. Metallus ochreus Smith is now known from Virginia to New Hampshire and is strictly univoltine, with immature larvae overwintering in leaves of bristly dewberry (R. hispidus L.). Parasitoids reared from Metallus include species of Eulophidae, Braconidae, and Ichneumonidae.

The three species of Hyalopterus Koch cause economic damage to various stone fruit trees of the genus Prunus L., H. pruni (Geoffroy), H. amygdali (Blanchard), and H. persikonus Miller et al. Although the third species was established recently, it has been suggested that one of the twelve older synonyms of the first two may be applicable to the third. We undertook a synonymic revision of the nominal species of Hyalopterus to clarify the taxonomy and nomenclature of the genus. The three valid species of Hyalopterus are affirmed to be H. pruni (the mealy plum aphid), H. amygdali, and H. arundiniformis Ghulamullah, stat. nov. We determined that H. mimulus Börner and H. persikonus are junior synonyms of H. arundiniformis, syn. nov., and that Brachysiphum kobachidzei Rusanova is not a synonym of H. amygdali but a valid species of Aphis, stat. nov., comb. nov. Aphis amygdalipersicae Mosley is likely a senior synonym of Brachycaudus helichrysi (Kaltenbach), syn. nov.; to maintain current usage, we establish the former as a nomen oblitum with respect to the latter. Finally, several other nominal species were unevaluable and are therefore listed as nomina dubia.

The Palearctic plant bug Rhabdomiris striatellus (Fabricius) (Heteroptera: Miridae: Mirinae) is reported for the first time in North America, based on specimens collected on pin oak, Quercus palustris Münchh., and white oak, Q. alba L. (Fagaceae), from Long Island, New York. A diagnosis and photographs of the adult male and female are provided and the seasonal history, host plants, and distribution are reviewed.

Two new species of Macrosiphum are described, both of which live in similar dry forest habitats of the inland northwestern U.S.A.: Macrosiphum dewsler n. sp. from Linum lewisii (Linaceae), and Macrosiphum garyreed n. sp. from Geum triflorum (Rosaceae). Information is presented about the habitats, host plant biology, distribution, and taxonomy of both species.

Amyelois transitella (Walker) (Lepidoptera: Pyralidae), the navel orangeworm, is an important pest of a wide variety of fruits and their seeds. We discovered and report for the first time A. transitella feeding on Sapindaceae in wild populations of U. speciosa (Endl.) in northeastern Mexico. We provide photographs of the plant, the adult, and the larval and pupal stages of the moth. Although A. transitella is a pest in other areas, it is not considered a pest in northeastern Mexico.

The eastern Asian brown marmorated stink bug, Halyomorpha halys (Stål), is a nuisance and a crop pest in many parts of the United States. Mainly reports of citizens that were verified by experts were used to show that the distributional range of H. halys in Connecticut steadily increased from 2008 when it was first discovered until June 2015 when it was generally present throughout the state. The number of sightings (grouped by 12-month periods from 1 July to 30 June of the next year) showed a three-tiered pattern, being low in the first two reporting periods, higher in the next three, and highest in the last two. The number of new towns (local governing units in the state) documented to have H. halys increased from 2008–2009 to 2010–2011, and then generally decreased thereafter. On a diversified farm in Hamden, Connecticut, adults entered an ultraviolet light-trap during eight weeks between late July and mid-September in 2012 and 2013. About six years elapsed between the capture of the first specimen in December 2008 and recognition of H. halys as an agricultural pest in late 2014.

Ormocerus dirigoius Morin & Gates, n. sp. is described and compared to the North American O. americanus Dzhanokmen and Grissell and European species O. latus Walker and O. vernalis Walker. A range expansion into the Nearctic is reported for O. latus, previously only known from the Palearctic. Specimens were collected in Harpswell, Maine during a study of the parasitic Hymenoptera community associated with Operophtera brumata Linnaeus (Lepidoptera: Geometridae), an invasive species. The species are keyed and illustrated using macrophotography and scanning electron microphotography.

A new Caribbean cicada Carineta acclivis Sanborn, new species is described and illustrated. This is the second species of Carineta Amyot & Audinet-Serville, 1843 described from Martinique and the Lesser Antilles. Carineta martiniquensis Davis, 1934 is illustrated and distinguished from the new species. The adults of both cicada species on Martinique are active in forest habitats and have extended emergence periods during the year but appear to be separated by an altitudinal gradient.

Caliroa dionae Smith and Moisan-De Serres, n. sp., is described from Quebec. The species was reared from larvae feeding on highbush blueberry, Vaccinium corymbosum L. (Ericaceae) and is the first North American record of a species of Caliroa feeding on Vaccinium. It is distinguished from other North American Caliroa species and from Palearctic species of Caliroa that feed on Vaccinium.

Sorolopha angustorbis, new species, is described from Taiwan. The adult and genitalia are illustrated.

The bryocorine mirid Tenthecoris tillandsiae Henry (Hemiptera: Miridae) was described as a new species in 2016. Although the type locality is Charleston, South Carolina, the species is considered adventive in the United States and native to Latin America. Spanish moss (Tillandsia usneoides [L.] L.; Bromeliaceae) is the plant bug's only known host. Tenthecoris tillandsiae was found in three counties of the greater Charleston area in clumps of Spanish moss that grew on ten species of woody plants, especially Darlington oak (Quercus hemisphaericaW. Bartram exWilld.; Fagaceae) and live oak (Q. virginiana Mill.). Nymphs and adults fed on strands of the moss, on which they left dark spots of excrement. Overwintered eggs hatched in mid- to late April, with first-generation adults appearing by early May. Two additional generations were produced; nymphs were present into October, and an adult female was found as late as mid-December. Tenthecoris tillandsiae sometimes was syntopic with a native plant bug (Phytocoris tillandsiae Johnston) that specializes on Spanish moss. Pathways of entry that might have allowed T. tillandsiae to enter the southeastern United States from South America (where Spanish moss originated), Central America, or Mexico are discussed. This immigrant mirid is suggested to be a benign addition to the arthropod community associated with Spanish moss, a plant not only symbolic of the South, but also one known to help conserve insect biodiversity.