The Lattinova complex is described, comprising five new genera: Fronsetta, Lattinova, Metopocoris, Sinistropa and Watarrkamiris. All taxa in this complex are defined by the subrectangular head. All species in the Lattinova complex are described as new to science, and includes two species of Fronsetta (F. geraldtoni and F. maculatus), nine species of Metopocoris (M. asquithi, M. carnarvoni, M. cassiae, M. forresti, M. joannae, M. magenta, M. rubrifasciata, M. scutata and M. uberini), Lattinova jacki, four species of Sinistropa (S. elongatus, S. kulgera, S. northami and S. rawlinna), and two species of Watarrkamiris (W. pallidus and W. serpentinae). The male genitalia are illustrated for all species except M. scutata, where males are unknown. The female genitalia of the type species of all the genera are illustrated, including the inter-ramal lobes. All taxa are keyed. Homologies and terminology of the male genitalia are reviewed, and a new hypothesis of aedeagal evolution is proposed—the torsion hypothesis of endosomal spicules.

Lattinestus , a new genus of amnestine Cydnidae, and three new species, L. amplus from Costa Rica, L. andersoni from Ecuador, and L. coleopterus from Mexico, are described, keyed and illustrated. Types of all three species were collected in forest litter at relatively high elevations.

The genus Acaricoris contains to date six species recorded from United States (2), Panama, Puerto Rico, Guadeloupe and Haiti; all of them are apterous and endemic. A new species from the Dominican Republic sharing the characters leading to Acaricoris in the key by Usinger and Matsuda (1959) is described as A. lattini, n.sp., and illustrated.

Orius majusculus (Reuter), a widespread Palearctic species, is reported in North America for the first time based on specimens collected in Ontario, Canada. A diagnosis, description, photographs of the adult, photomicrographs of selected structures, and illustrations of male genitalia are presented to help distinguish O. majusculus from other North America species of the genus.

The predatory true bugs Anthocoris antevolens White and A. musculus (Say) (Hemiptera: Heteroptera: Anthocoridae) are geographically widespread species in North America having broadly overlapping ranges. The two species are similar in coloration, size, host-plant use, and general appearance of the male genitalia. They are separated in keys by characteristics of the pubescence on the hemelytra: A. antevolens, pubescence long and dense; A. musculus, pubescence short and sparse. However, the extensive variability in this trait, in combination with similarities in other traits, has led to questions about whether A. antevolens and A. musculus are actually distinct species. We compared behavioral, morphological, and molecular genetic traits among specimens collected from four geographic regions, whose appearance would identify them as A. musculus (from three populations: Maine, Michigan, Montana) or as A. antevolens (from one population: central Washington). We included for comparison results for three populations of A. antevolens shown in earlier publications to differ in behavior, morphology, and mitochondrial DNA. Our results showed that identifications made using pubescence traits often failed to parallel variation in other characteristics, notably appearance of the male genitalia, mating success, and DNA sequences. In sum, our results indicate that variation among populations of A. antevolens in morphological, behavioral, and genetic traits may often exceed differences in those same traits between A. musculus and A. antevolens, if identifications are made using available keys.

During a review of the Blepharicera of western North America, we discovered a new species from several mid-sized rivers in southwestern Oregon and northwestern California. We hereby present descriptions of the larvae, pupae, and adults of B. kalmiopsis, new species. Diagnostic characters and a brief discussion of bionomics and distribution are also provided. Based on previous and ongoing studies, B. kalmiopsis clearly belongs to the B. micheneri Alexander species group and appears closely related to B. zionensis Alexander.

Three new species of North American Nabidae are described: Hoplistoscelis confusa, n. sp., Nabis latior n. sp., and Pagasa lattini n. sp. A diagnosis, description, a dorsal and lateral color photograph, a pen and ink dorsal habitus illustration, drawings of male and/or female genitalia, and comments on their relationship with other species are given for each. Nabis mexicanus Remane is recorded from the United States for the first time and new U.S. state or Canadian province records are given for several species. Clarification of misidentifications since the 1988 North American nabid catalog are reported. A revised checklist of the North American Nabidae is provided, giving current generic and subgeneric combinations for 41 species.

Species of the shore-fly genus Hecamedoides Hendel from the Nearctic Region are revised, including description of H. lattini, new species (Virginia. Stafford: Falmouth (38°19.2′N, 77°28.1′W; Rappahannock River; 9 m). To provide context and also to facilitate identification, diagnoses are provided for the tribe Discocerinini and genus in addition to a key to the genera and species, H. lattini and H. unispinosus, occurring in the New World. Diagnostic characters, especially of the male terminalia, are illustrated, and distribution maps are also provided.

Male genitalia, including the pygophore, parameres, and inflated aedeagus, are compared between Murgantia histrionica (Hahn), M. varicolor (Westwood), and M. violascens (Westwood). These structures differ markedly between the three species, particularly the inflated aedeagus. As the inflated aedeagus has not been used previously in this genus for comparative purposes, we suggest that it be examined in the remaining species of Murgantia to determine if the current taxonomic status of each of these species is warranted.

Here we report new host plant records for the coreid Leptoglossus oppositus (Say) and summarize the available host plant data from the literature. Our collection records add six new host associations to the known information for L. oppositus (bald cypress, trumpet creeper, American beautyberry, sunflower, tuliptree, and red mulberry) and corroborate published observations of this species on catalpa, jimsonweed, pecan, and tomato. Breeding hosts range from annual crops to vines, shrubs, and trees, and include gymnosperms, monocots and dicots from 15 families. Adding adult records to this total yields 22 families and 29 genera as potential or actual food plants. Field observations, coupled with published accounts, indicate that nymphs are strongly associated with the presence of host reproductive structures, although adults may be collected on host plants during non-fruiting periods. Overlap with congeners [e.g., L. phyllopus (L.), L.corculus (Say)] occurs on several host plant species. Like the leaffooted bug (L. phyllopus), L. oppositus appears to be a specialist on reproductive structures but highly polyphagous.

A new genus of Gerridae, Floresiobates, is described from the island of Flores in the Lesser Sunda Islands of eastern Indonesia, with F. lattini n. sp. as the type species. Floresiobates is compared with Rheumatogonus Kirkaldy and Jucundus Distant, and these three genera are considered on the basis of various shared character states to be closely related. Illustrations of key characters and a distribution map are provided, accompanied by a discussion of the ecological setting in which the type series was collected, and a consideration of the biogeographic implications of this discovery.

Lattinidea, new genus, is proposed to accommodate Mormidea geographica (Fabricius) and Lattinellica, new genus, is proposed for Mormidea decora Walker. Diagnoses and a key are provided to separate both new genera from Mormidea Amyot & Serville and similar genera. Lattinellica decora is described and illustrated; Lattinidea geographica is illustrated. New information on a host plant for L. geographica is given, and new distribution records are provided for both species.

Nemausus lattini, n. sp. is described from Kenya and named in honor of J. D. Lattin and in celebration of the first eight decades of his life. The genus is redescribed, and the species of Nemausus are discussed. Relationships of the genus with other alydine genera are discussed, particularly with the closely related Zulubius.

Beckocoris Knight, 1968, is revised and redescribed; three new species—B. brendae, B. inventarium, and B. lattini—are described; and Nevadocoris bullatus Knight, 1968, is transferred to Beckocoris, n. comb. All species of Beckocoris are recorded breeding on species of Tetradymia (Asteraceae) with additional records from Chrysothamnus spp. (Asteraceae) and “Dalea” (Fabaceae: Papilionoideae). Nevadocoris Knight, 1968, is revised, redescribed, and two new species—N. lattini and N. tetradymii—are described; all species are recorded breeding on Tetradymia spp., with additional records from Chrysothamnus spp., “Dalea” and Phlox (Polemoniaceae). Species within each genus have largely allopatric distributions within the Great Basin, including most of the Mojave Desert in the south, as well as parts of eastern Utah. Lattinophylus artemisii, new genus and new species, is described as breeding on Artemisia spp., primarily A. tridentata (Asteraceae), with a range largely coterminous with species of Beckocoris and Nevadocoris.

An argument is made for the monophyly of the tribe Stenodemini China 1943 based on a character discussion treating the pretarsus, metepisternal scent efferent system, external cuticular ultrastructure, male and female genitalia, metafemoral trichobothria, and external morphology of head and pronotum. As a result, a proposal is presented to subsume Pithanini Douglas and Scott 1865 with Stenodemini. A cladistic analysis of the nominate stenodemine genera based on 54 characters is conducted. The revised Stenodemini includes 32 genera. The following junior subjective generic synonyms are proposed: Notostiropsis Poppius 1914  =  Ebutius Distant 1909; Penacoris Cavalho and Rosas 1966  =  Stenodema Laporte 1832; and Trigonotyliscus Carvalho 1975  =  Trigonotylus Fieber 1858. A lectotype is designated for Ebutius bellus Distant 1909. Chaetomiris Bliven 1973 is treated as a nomen dubium. A key to the genera and a diagnosis of each recognized genus of the reconstituted Stenodemini are presented. A list of the included species, with a summary of their distributions based on faunal regions is given for each genus. Selected photomicrographs, scanning micrographs, and illustrations of structural features of stenodemine genera are provided.

Three new species of Heteroptera are described from British Columbia, namely Arhyssus rubrovenosus (Rhopalidae), Delochilocoris gracilis, and Trapezonotus lattini (Rhyparochromidae). Delochilocoris gracilis is also reported from Idaho and Oregon, whereas paratype material of T. lattini includes specimens from California, Oregon, and Washington.

Scobina lattini , n. sp., from Costa Rica and Panama, S. alas, n. sp., from Costa Rica (Argidae), and Decameria lattini, n. sp., from Costa Rica (Pergidae) are described. The species are illustrated, and a key is presented for the four species of Scobina having bicolored wings in which vein M meets Sc R some distance from the point where vein Rs M meets Sc R.

Tornocrusus lattini Štys and Baňař n. sp. (Hemiptera: Heteroptera: Enicocephalomorpha: Aenictopecheidae: Aenictopecheinae) is described from Ecuador (♂, ♀) and differentiated from other species of the genus. The species is characterized by several autapomorphies; the most important being the asymmetry of female first valvulae—the first somatic asymmetry found in the Enicocephalomorpha. The forewings are characterized by presence of remigial CuA2 and claval AP, features here reported for the first time, but possibly overlooked in other Aenictopecheinae.

Three closely related species of phyline plant bugs are unique in the diverse family Miridae because of their remarkable antennae; the third (or second and third) flagellomere is enlarged and bears erect, dark, scalelike setae. Host plants for two of the species—Hambletoniola antennata Carvalho and Larinocerus balius Froeschner—have been known, but no host information has been available for L. personatus (Knight). Escobilla butterflybush, Buddleja scordioides Kunth (Scrophulariaceae), is newly recorded as the host of L. personatus in western (Trans-Pecos) Texas, and new Texas records are given for this seldom-collected mirid. New distribution records also are given for H. antennata in western Texas, in addition to its occurrence on ceniza, Leucophyllum frutescens (Berl.) I.M. Johnston (Scrophulariaceae). Scanning electron micrographs of the antennal setae of L. personatus are provided; included for both mirid species are color photographs of their host plants and an adult on host foliage.

The first Newfoundland records are given for 12 Palearctic species: the aphids Acyrthosiphon caraganae (Cholodkovsky), A. pisum (Harris), Hyperomyzus lactucae (L.), Macrosiphoniella artemisiae (Boyer de Fonscolombe), Pleotrichophorus glandulosus (Kaltenbach), Tuberculatus annulatus (Hartig), and Uroleucon cirsii (L.); leafhoppers Athysanus argentarius Metcalf and Grypotes puncticollis (Herrich-Schaeffer); anthocorids Acompocoris pygmaeus (Fallén) and Anthocoris confusus Reuter; and microphysid Loricula pselaphiformis Curtis. All 12 Old World species are considered immigrant (rather than intentionally introduced) in Newfoundland. Two mirid species native to North America—Deraeocoris piceicola Knight and D. pinicola Knight—also are reported as new to the island. All 14 hemipteran species were collected in the eastern Avalon Peninsula (13 were found at the major port city of St. John's) and were found mainly on Old World plants. The record of the mirid D. piceicola is the first for eastern Canada, and that of the microphysid L. pselaphiformis represents the second for North America; this species was known previously only from Halifax, Nova Scotia. A summary of the previously recorded North American distributions and host-plant associations of the 14 species is provided.