Abstract The systematic position of Nemognatha nigrotarsata (Fairmaire and Germain, 1861) is updated, based on the external morphology and male genitalia, illustrating the latter organ and habitus of the species. Taxonomic and faunistic notes, biological observations and behavioral observations are provided, reporting the first known vector of the species and its geographical distribution in Chile.

Resumen Se actualiza la posición sistemática de Nemognatha nigrotarsata (Fairmaire y Germain, 1861), con base en la morfología externa y órgano genital masculino, ilustrando esta última estructura y el hábito de la especie. Se proveen notas taxonómicas y faunísticas, observaciones biológicas y de comportamiento, reportando al primer vector conocido de la especie y su distribución geográfica en Chile.

Abstract The biology and ecology of wedge-shaped beetles (Coleoptera: Ripiphoridae) are scarcely known in the Neotropical realm. Chilean species of this beetle family are currently represented by two genera: MacrosiagonHentz, 1830 and RipiphorusBosc, 1791, and three species, only known from their type localities. Here, we present an updated catalog of Chilean Ripiphoridae, along with the new distributional and biology records. Also, Macrosiagon flavipennisLeConte, 1866 (Ripiphorinae: Macrosiagonini) has been reported for the first time in Chile. We discuss the reasons for the presence of M. flavipennis in urban areas, the state of knowledge of the endemic species presents in Chile in relation to their distribution and the opportunity to use opportunistic records to better understand their natural history.

Abstract: Tetraonyx sexguttata is recorded for the first time for Bolivia and Venezuela. A diagnosis is provided, and the adult habits of the species are illustrated, the possible existence of subspecies and their presence in countries where it has not been previously recorded is discussed.

Resumen: Se registra por primera vez a Tetraonyx sexguttata para Bolivia y Venezuela. Se provee una diagnosis y se ilustran los hábitos adultos de la especie, se discute la posible existencia de subespecies y su presencia en países en que no ha sido registrada previamente.