e realizó un estudio de Monomachus (Hymenoptera, Monomachidae) con cinco trampas Malaise por área, en cinco áreas del bosque lluvioso Atlántico en el Estado de São Paulo, Brasil, entre octubre de 2009 y diciembre de 2011. El esfuerzo de muestreo en todas las localidades ascendió a 9.900 trampas-día. Se obtuvo un total de 304 ejemplares de Monomachus: 66 hembras y 238 machos. La mayor ocurrencia de Monomachus fue entre junio y septiembre, con pico de frecuencia en julio, siendo más frecuentes en el Parque Estadual Morro do Diabo (PEMD) (350 m sobre el nivel del mar), donde el esfuerzo de muestreo para capturar cada ejemplar fue de 65,1 trampas-día. Del total de hembras de Monomachus capturadas del Parque Estadual Intervales, Parque Estadual da Serra do Mar/Núcleo Santa Virgínia (PESM/NSV), PEMD y Estação Ecológica Juréia Itatins entre diciembre 2009 y diciembre 2010 se reconocieron dos especies: M. fuscator (N = 58 / 87,9 %) y M. cubiceps (8,0 / 12,1 %). En muestreos adicionales en 2011 en PESM/NSV se obtuvieron dos ejemplares de M. klugii sólo registrada para el Estado de Río de Janeiro, y ahora su distribución se extiende al Estado de São Paulo.

A survey of Monomachus (Hymenoptera, Monomachidae) was carried out with five Malaise traps/area in five areas of Atlantic Rainforest in São Paulo State, Brazil. The sampling effort in all localities amounted to 9,900 traps-day. Data were obtained from a total of 304 exemplars of Monomachus: 66 females and 238 males. The highest occurrence of Monomachus was observed between June and September with a frequency peak in July, and they were most frequent in Parque Estadual Morro do Diabo (PEMD) (350 m above sea level), where the sampling effort to catch each exemplar was 65.1 traps-day. From the sample of females of Monomachus captured in the Parque Estadual Intervales, Parque Estadual da Serra do Mar/Núcleo Santa Virgínia (PESM/NSV), PEMD and Estação Ecológica Juréia Itatins, between December 2009 and December 2010, two species were recognized: M. fuscator (N = 58 / 87.9 %) and M. cubiceps (8 / 12.1 %). In additional samplings in 2011 at PESM/NSV two exemplars of M. klugii recorded only from Rio de Janeiro State, Brazil were obtained, showing that its distribution has extended to São Paulo State.

This is the first report of the interaction between the seed-feeding M. transvaalensis and S. polygamous, a native fruit from South America.

Este es el primer registro de la interacción entre Megastigmus transvaalensis y semillas de Schinus polygamus, un fruto nativo de América del Sur.

As espécies de Coenosia Meigen (Muscidae, Coenosiinae) são conhecidas predadoras de outros insetos, apresentando um papel importante como potenciais agentes de controle biológico. Seis espécies de Coenosia têm sido registradas na Europa predando insetos praga, uma delas é Coenosia attenuata Stein. Esta espécie foi recentemente registrada na Região Neotropical e é aqui registrada pela primeira vez no Chile. Notas biológicas são incluídas.

First record of Coenosia attenuata Stein (Diptera, Muscidae) from Chile, with biological notes. Coenosia Meigen (Muscidae, Coenosiinae) species are known as predators of other insects and play an important role as potential biocontrol agents. Six species of Coenosia have been recorded in Europe preying on insects pests, one of them is Coenosia attenuata Stein. This species was recently recorded from the Neotropical Region and is herein recorded for the first time to Chile. Biological notes were included.