In the present study, data on the interaction between wasp specimens of the species Epipompilus platensis Roig Alsina, 2017 (Hymenoptera, Pompilidae) and spiders of the species Ariadna mollis (Holmberg 1876) (Araneae, Segestriidae) are presented for the first time. Present in the localities of Punta Lara (Partido de Ensenada) and José Hernández (Partido de La Plata), both belonging to the province of Buenos Aires. Several specimens of A. mollis were collected on april 2015, and those that presented an egg or a small larva attached to the back of the abdomen were selected. They were kept under observation in a bioterium until completing the development of the wasp's adult state. Of the total spiders collected, 9.6% were parasitized by wasps. Of that percentage, four larvae of E. platensis reached the adult stage (three females and one male). The results obtained contribute to the knowle...

In the present study, data on the interaction between wasp specimens of the species Epipompilus platensis Roig Alsina, 2017 (Hymenoptera, Pompilidae) and spiders of the species Ariadna mollis (Holmberg 1876) (Araneae, Segestriidae) are presented for the first time. Present in the localities of Punta Lara (Partido de Ensenada) and José Hernández (Partido de La Plata), both belonging to the province of Buenos Aires. Several specimens of A. mollis were collected on april 2015, and those that presented an egg or a small larva attached to the back of the abdomen were selected. They were kept under observation in a bioterium until completing the development of the wasp's adult state. Of the total spiders collected, 9.6% were parasitized by wasps. Of that percentage, four larvae of E. platensis reached the adult stage (three females and one male). The results obtained contribute to the knowle...

In the city of La Plata occurs the genus Tityus with records dating back to 1943. The territorial distribution of the genus Tityus in this city and its expansion was studied based on inquiries received at the CEPAVE Arachnology Laboratory from individuals and public and private institutions. 189 inquiries were received from 2005 to 2020. The QGIS program was used to geolocate each scorpion with urban layout layers and storm drains. For the spatial analysis of distribution, a home range of one hectare per individual was considered to calculate the area and in the cases of areas of overlapping influences during the same year, the area was considered as their union. The genus Tityus in the city of La Plata is represented by the species T. carrilloi and T. confluens, both of health interest and of synanthropic habits, which occupy two different well-defined areas. The analysis of the indepen...