Based on a study of 1,100 specimens of the genus Agra (Coleoptera: Carabidae: Lebiini: Agrina) from Costa Rica, twenty-nine new species were discovered and are here validated and described: A. catie, n. sp. (type locality: Limon, Tortuguero National Park, Estacion Cuatro Esquinas, sea level, LN 280000,590500); A. catbellae, n. sp. (type locality: Cartago, Turrialba, 600m, 09°53'N 083°38'W); A. ...

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The genus Calosoma (Coleoptera: Carabidae) is a group of large, sometimes ornate beetles, which often voraciously attack caterpillars. Many studies have reported Calosoma beetles being highly conspicuous during defoliator outbreaks. Based on observations of individual beetle behavior, patterns of activity density and phenology we provide a hypothesis on how environmental cues may synchronize Ca...

Among the several European and Asiatic species belonging to the genus Cychrus Fabricius, the pre-imaginal morphology is known just for a few of them. In the present work the larval morphology of Cychrus schmidti and C. semigranosus is described. The morphology of the first species is unique due to its chaetotaxy, which is completely different from that of all of the other Cychrus larvae describ...