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Antigonon leptopus Hook. & Arn. (Polygonaceae), popularly known as amor-agarradinho, is an ornamental plant widely used as a resource for honey bees and stingless bees, however, there is little information on the diversity of bees that use its floral resources, especially in Brazil. The objective of this study was to identify the diversity and behavior of A. leptopus floral visiting bees, as well as to investigate the influence of the microclimate on floral visits, and the efficiency of bees in pollination of the plant. The data collection occurred in the peak of the blooming of the plant, in an area of semi-arid (Petrolina, Pernambuco State, Brazil). Fourteen species of bees were recorded, most collecting nectar and pollinating the flowers from intrafloral behavior. Apis mellifera, Centris trigonoides, and Trigona spinipes were the most frequent species, respectively. The floral visits were concentrated in the morning period, where lower temperature values and higher relative air humidity were recorded. The bees were very efficient in the pollination of flowers (71.08%), compared to spontaneous self-pollination (2.86%). A. leptopus has mellitophilous flowers, attracting a considerable diversity of species, being characterized as a plant with potential for honey bees and stingless bees, and for providing resources for wild bees. [ABSTRACT FROM AUTHOR]

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Our proposal used two research experiences to carry out a study on the use of private sources in historical investigations related to Italian immigration to Rio Grande do Sul state, Brazil. In the first case, we focused on Italian physician Giovanni Palombini and his travel report, analyzing the intellectual project which aimed for Italian immigration to a still-undeveloped area of the Rio Grande do Sul countryside. In the second case, using documents from the Julio de Castilhos Private Archives, we chose letters relating to Italian immigrants and their descendants seeking greater political and social space. The researched historical sources expanded the image of Italian immigrants and their descendants beyond the information contained in traditional document records, expressing world views and expectations of individuals representative of significant groups in society. [ABSTRACT FROM AUTHOR]