Tinotus refusus, new species, is described based on specimens collected from refuse piles of Atta ants from San Luis Potosi, Mexico. This is the second recorded instance of Tinotus collected from Atta refuse piles and likely represents a species specific to this habitat. An annotated world catalog of Tinotus is also presented with lectotype designations for T. binarius Casey, T. brunneus Casey, T. carnivorus (Cameron), T. castaneus Cameron, T. caviceps Casey, T. cavicollis Sharp, T. coelebs Casey, T. densissimus Bernhauer, T. densiventris Casey, T. flavescens Sharp, T. fusinus Casey, T. imbricatus Casey, T. indicus Cameron, T. kashmiricus Cameron, T. pallidus Casey, T. paratus Casey, T. parvicornis Casey, T. pectinellus Casey, T. rufipennis Cameron, T. texanus Casey, and T. trisectus Casey. Tinotus is transferred from the Hoplandriini to the Aleocharini based on numerous shared characters that likely represent synapomorphies for the Aleocharini.

Cotalpa conclamara Young, new species, is described from specimens taken on Quercus stellata Wangenheim and at UV light in eastern Texas. The holotype and certain identifying characters are illustrated, and a key to the species of Cotalpa Burmeister is provided. A new country record is given for C. consobrina, new state record for C. subcribrata and new state and Canadian provincial records for C. lanigera.

Two species of athetine rove beetles are recorded from Inaccessible Island, in the Tristan da Cunha group of islands in the South Atlantic for the first time. One species, Halobrecta flavipes Thomson, represents a new introduction possibly from the Palearctic region, and the other species, Atheta (Xenota) pseudoinsulana Klimaszewski, new species, is of an undetermined origin. The latter belongs to the Laticollis group of species that are broadly distributed and are known to occur in the Palearctic, Nearctic, Afrotropical, and Oriental regions as well as some Atlantic Islands. The lectotype is designated for Homalota dilutipennis Motschulsky [= Atheta dilutipennis (Motschulsky)].

Tiger beetles of the genera Phaeoxantha Chaudoir and Tetracha Hope are considered to be flightless or to fly only occasionally. Six species of these genera inhabit Central Amazonian floodplains and show strong differences in life cycles, behaviour, and habitats. From this background we investigated flight ability in these species by determining flight muscle development in specimens regularly collected between 1997–1999. Gonad states (in females) as well as teneral females were recorded to estimate beetle age. Of 1,946 adult beetles of these six species we dissected, 31.4% had fully developed flight muscles, suggesting flight ability. In the other 68.6% of specimens flight muscles were completely absent. Frequency of flight muscle presence varied greatly among species, ranging from 100% in Tetracha species, and 0 to 60% in Phaeoxantha species. No evidence for an “oogenesis flight syndrome” was found in females as flight muscle states were not correlated with age. These findings are interpreted as flight (muscle) dimorphism in Phaeoxantha species. Flight muscle presence in males and females was only different in P. klugii Chaudoir with flight ability being more frequent in females. Tetracha species use flight as an integral part of their survival strategy in Central Amazonian floodplains, unlike Phaeoxantha species. A possible correlation between the degree of flightlessness and habitat stability in Phaeoxantha species is discussed.

The weevil genus Entimus Germar is a monophyletic taxon, recognized by a combination of the following characters: large size (12–45 mm); presence of green, blue, and gold iridescent scales; antennae reaching base of prothorax, with second funicular article scarcely longer than first; widened frontal groove; pronotum as wide as long, granulate; elytra triangularly shaped; tibiae not crenulated or dentate within; scutellum protruding; and aedeagal apex slightly acute. It includes seven species, which are endemic to the Neotropics, ranging from Mesoamerica to northeastern Argentina. A cladistic analysis was carried out using 16 characters from external morphology, body vestiture, and male genitalia. The analysis yielded four equally parsimonious cladograms, each with 33 steps, a consistency index of 0.60, and a retention index of 0.53. After successive weighting, a single cladogram resulted, with 105 steps, a consistency index of 0.89, and a retention index of 0.90. According to this cladogram, the species of Entimus follow the sequence: E. arrogans Pascoe, E. granulatus (Linnaeus), E. imperialis (Forster), E. fastuosus (Olivier), E. sastrei Viana (= E. formosus Viana, syn. nov.), E. nobilis (Olivier), and E. excelsus Viana. According to predictions based on phylogenetic and distributional information available, the most likely mode of speciation for four species of the genus is sympatric, whereas E. arrogans and E. granulatus have followed an allopatric mode of speciation, and E. sastrei has followed the centrifugal mode of speciation.

The results of a study on the fauna of Cerambycidae of the tropical dry forest of “El Aguacero,” Chiapas, Mexico are presented. Data were obtained during a year of monthly collections and records obtained during sporadic collections carried out mainly during the rainy season. A total of 203 species, representing 119 genera, 42 tribes and four subfamilies were recorded. Seventy-nine species were recorded for the first time for the state of Chiapas. The subfamilies with the greater numbers of species, genera and tribes were the Cerambycinae with 111, 66 and 22 and Lamiinae with 81, 45 and 16, respectively. The genera with the greatest numbers of species were Stenosphenus Haldeman, Sphaenothecus Dupont, Lepturges Bates and Phaea Newman with six each and Anelaphus Linsley, Psyrassa Pascoe, Neocompsa Martins and Acyphoderes Serville with five each. The largest number of species was recorded during June (101) and the least during March (two); the largest number of individuals was recorded during September and the least during February. Seasonally, 165 species were collected during the rainy season, 17 during the dry season and 21 during both. Six hundred twenty two individuals were collected during the rainy season and 249 during the dry season. The species abundance pattern showed few abundant species and many with few individuals (63% were represented by three or fewer individuals). The most abundant species were Stenosphenus cribripennis cribripennis Thomson (51 individuals), Essostrutha laeta (Newman) (45), Ironeus pulcher Bates (43), Ochraethes sp. near O. sommeri (Chevrolat) (38), Sphaenothecus toledoi Chemsak and Noguera (33), Sphaenothecus trilineatus Dupont (31), Ochraethes pollinosa Chevrolat (31) and Sphaenothecus maccartyi Chemsak and Noguera (30). The seasonal activity of most species as adults was restricted, with 141 species found only during one month and 37 during two months. The fauna of “El Aguacero” was compared with two other similar sites in Mexico, and is more similar to that of Chamela, Jalisco than to that of Huautla, Morelos; sharing 78 species with the first and only 41 with the second.

Larvae of Desicasta laevicostata (van de Poll 1886) (Coleoptera: Scarabaeidae: Cetoniinae: Gymnetini) were found developing in living stalk tissue of the bromeliad Vriesea sanguinolenta Cogn. and Marchal (Bromeliaceae) in Panama. This is the first record of Cetoniinae using living plant tissue as a larval substratum. The male of this species is described for the first time and its aedeagus is figured.

A new species of Mayetia Mulsant and Rey, Mayetia (Mayetia) ramon, is described from Galicia (northwest Spain). The type locality is: Monastery of Caaveiro, A Capela (A Coruña). Mayetia ramon is similar to M. (Mayetia) perezinigoi Outerelo in that both share mandibles with a simple tooth and a horse-shoe shaped cleft in the male pygidial sternite. The species' affinities with the M. ochsi Coiffait group of species are analyzed. This species was found in the humus layer of an Atlantic mixed forest.

Description of all larval instars of Agabetes acuductus (Harris) is presented including a detailed chaetotaxic and porotaxic analysis of the cephalic capsule, head appendages, legs, last abdominal segment and urogomphi. A parsimony analysis based on the 43 informative larval characteristics was conducted with PAUP. Boostrap values indicate strong support for the monophyly of the clade containing the genus Agabetes Crotch and members of the subfamily Laccophilinae. This is supported by five synapomorphies: (i) egg bursters positioned posteriorly, contiguous to the coronal suture, (ii) presence of two lamellae clypeales in instar I, (iii) absence of the primary setae LA10 and LA12, (iv) absence of a ventroapical spinula on antennomere 3, and (v) abdominal venter 6 sclerotized.

A new species of Enaphalodes, E. archboldi Lingafelter and Chemsak, is described from Archbold Research Station, Highlands County, Florida. This localized species has been confused with A. rufulus (Haldeman), a widespread species, which it resembles. Romaleum decipiens Bates is designated as a new synonym of E. atomarius (Drury). Romaleum cylindricum Knull is designated as a new synonym of E. cortiphagus (Craighead). Diagnoses, habitus photographs and drawings, and a key to the nine recognized species of Enaphalodes are provided.

Pseudokarumia Pic is moved from the Dascillidae to the Telegeusidae where it becomes the third known genus for that family. The characters placing this genus, and the presence of undescribed members in Costa Rica and Panamá, are discussed. A key to the world genera of adult male Telegeusidae is provided.

After examining the type species of Cryptocanthon, C. paradoxus Balthasar, and other species in Cryptocanthon, we have concluded that C. borgmeieri Vulcano, Pereira and Martinez should be removed from the genus and placed in a new genus as a sister taxon. Therefore, a monotypic new genus, Paracryptocanthon, is described here for the species C. borgmeieri.

A new chrysomeline genus, Ewanius, is described from Tasmania, Australia. The genus is founded on a single species, Ewanius nothofagi new species, a plesiomorphic member of the tribe Gonioctenini Motschulsky. Ewanius is compared with similar genera, particularly Araucanomela Bechyné and Bechyné and Novacastria Selman, and the classification of Chrysomelinae is briefly discussed. All three genera are monotypic and feed on Nothofagus.