O cultivo de camu-camu Myrciaria dubia (H.B.K.) Mc Vaugh tem apresentado inúmeros problemas fitossanitários, dentre os quais, Tuthillia cognata Hodkinson et al. (Hemiptera: Homoptera, Psyllidae), que constantemente é citada como praga secundária. Os objetivos deste estudo foram determinar o nível e a intensidade de infestação (%) por T. cognata e estudar aspectos do ciclo biológico e do comportamento de T. cognata, em plantios experimentais de camu-camu. Foram selecionados, de forma aleatória, 17 e 14 exemplares nos plantios I e II, respectivamente. Para cada uma das variáveis estudadas, foram calculados a média aritmética, o desviopadrão, a variância e a amplitude de variação. Foi verificado um nível de infestação de 82% (plantio I) e 57% (plantio II), uma intensidade de infestação de 94% (plantio I) e 75% (plantio II) e uma média de seis ninfas/folha em cada plantio, o que indica que T. cognata representa uma das pragas-chave dessa cultura. Foram observados adultos de Chrysoperla sp. (Neuroptera: Chrysopidae) e ninfas de Reduviidae (Hemiptera: Heteroptera), que podem atuar como prováveis agentes de controle biológico de T. cognata.

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When seen as a whole, the hindgut, more than any other section of the digestive tube, provides insights for the taxonomy of higher-level taxa of Passalidae. This comparative cladistics study utilized parsimony analyses, with 57 terminal taxa (including five outgroups) and 18 characters from the ileum of most genera of passalid beetles (Coleoptera: Passalidae), which resulted in a single tree. Based on the results and the topology of the cladogram, the following classification was adopted: (Aulacocyclinae (Solenocyclinae (Proculinae (Passalinae, Macrolininae)))). Three subfamilies (Solenocyclinae, Proculinae, and Macrolininae) are here elevated from the tribal level to the subfamily level. The subfamily Passalinae is redefined and no longer contains any tribes. The family-group name Leptaulacinae is placed in synonym with Solenocyclinae and the family-group name Ceracupedini is placed in synonymy with Aulacocyclinae.

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In Brazilian amazonia, Cholini (Coleoptera, Curculionidae, Molytinae) is represented by 53 species distributed in seven genera: Ameris Dejean, 1821; Cholus Germar, 1824; Homalinotus sahlberg, 1823; Lobaspis Chevrolat, 1881; Odontoderes sahlberg, 1823; Ozopherus Pascoe, 1872 and Rhinastus schoenherr, 1825. This work documents the species of Cholini housed in the Invertebrate Collection of the Instituto nacional de Pesquisas da amazônia, Manaus, Brazil and gives the geographical and biological data associated with them. a total of 186 Cholini specimens were identified as belonging to 14 species (13 from Brazilian amazonia) and five genera (Cholus, Homalinotus, Odontoderes, Ozopherus and Rhinastus). only 24% of the Cholini species reported from Brazilian amazonia are actually represented in the InPa collection, underscoring the need for a more systematical collecting based on available biological information. The known geographical distribution was expanded for the following species: Cholus granifer (Chevrolat, 1881) for Brazil; C. pantherinus (olivier, 1790) for Manaus (amazonas); Cholus parallelogrammus (Germar, 1824) for Piraquara (Paraná); Homalinotus depressus (Linnaeus, 1758) for lago Janauacá (amazonas) and rio Tocantins (Pará); H. humeralis (Gyllenhal, 1836) for novo airão, Coari (amazonas) and Porto Velho (rondônia); H. nodipennis (Chevrolat, 1878) for Carauari, Lábrea (amazonas) and ariquemes (rondônia); H. validus (olivier, 1790) for rio araguaia (Brasil), Manaus (amazonas), rio Tocantins (Pará), Porto Velho and Br 364, Km 130 (rondônia); Odontoderes carinatus (Guérin-Méneville, 1844) for Manaus (amazonas); O. spinicollis (Boheman, 1836) for rio uraricoera (roraima); and Ozopherus muricatus Pascoe, 1872 for lago Janauacá (amazonas). Homalinotus humeralis is reported for the first time from "urucuri" palm, Attalea phalerata Mart. ex spreng.