Este estudo teve como objetivo acompanhar as atividades de Xylocopa (Neoxylocopa) frontalis (Olivier, 1789) em uma agregação de ninhos localizada no município de Morretes, Paraná, onde esta espécie é a principal agente polinizadora de Passiflora edulis f. flavicarpa (maracujá azedo), cultivo predominante na região. Foram observados o ciclo anual das abelhas, a seleção dos substratos (pedaços de troncos) e a aceitação de ninhosarmadilha feitos com quadros de madeira ou de gomos de bambus durante o ano de 2006. Nesta região a espécie X. frontalis foi univoltina, com um período de maior freqüência de fundação dos ninhos entre outubro e dezembro. As atividades externas aos ninhos iniciaram-se mais cedo no verão e se restringiram aos horários mais quentes no inverno. Quando correlacionadas mensalmente com o clima, os valores de temperatura mínima foram os que mais influenciaram o número de vôos. O número de fundações de ninhos foi fortemente associado às médias climáticas históricas da região de dois meses adiante às fundações, sugerindo uma melhor época para o nascimento da sua próxima geração em relação à precipitação, temperatura e fotoperíodo. Durante o período de floração de P. edulis houve sincronia entre as atividades diárias de X. frontalis com o horário de abertura das flores. Os principais inimigos naturais foram Cissites maculata Swederus (Coleoptera, Meloidae) e uma espécie de Leucospis Fabricius (Hymenoptera, Leucospidae). palavras-chave: Atividades externas; mamangavas; maracujá; ninhos; polinizadores. aBstract nesting Biology of Xylocopa (Neoxylocopa) frontalis (olivier) (Hymenoptera, apidae, Xylocopini) in morretes, paraná. The present study investigated the nesting activities of Xylocopa (Neoxylocopa) frontalis (Olivier, 1789) in a nest aggregation in Morretes, Paraná, where this species is the main pollinator of Passiflora edulis f. flavicarpa (yellow passionfruit), an important crop in the region. Annual nesting cycle, nest substrate selection and use of wood and bamboo trap nests were studied during 2006. In this region, X. frontalis has an univoltine cycle, with a peak of nesting founding from October to December. External flight activities started earlier in summer and were restricted to warmer hours of the day in winter. Number of flights per hour was significantly correlated with minimum air temperature, among main climatic variables. Number of new nests founded was more strongly correlated with average values of the regional historical climate variables prevailing two months after the nest foundations, suggesting selection pressure for emergence of new bees under favorable conditions of precipitation, temperature and photoperiod. During the main blooming period of P. edulis, a synchrony between the peak of daily flight activities and the beginning of anthesis was observed, a pattern confirming the tight interaction between these two species. The main natural enemies in the region were Cissites maculata Swederus (Coleoptera, Meloidae) and an unidentified species of Leucospis Fabricius (Hymenopt...

de operárias e machos de Bauru, SP, Brasil), e Trigona (Lestrimelitta) limao var. rufa (com base em 4 operárias de Rio Acre, Brasil). Posteriormente, em 1912, elevou esse táxon a gênero ao descrever L. cubiceps da África. Em 1931, descreveu L. ehrhardti (restrita ao território brasileiro). Moure (1946), baseado na especialização etológica do grupo e na ausência de corbícula nas tíbias posteriores das operárias, destaca este gênero em tribo à parte, Lestrimelittini. Porém, Moure et al. (1958)

Here we report for the first time data on parasitism of two species of Euglossa, E. intersecta Latreille, 1838 and E. anodorhynchi Nemésio, 2006, by conopid flies of the genus Physocephala Schiner, 1861. A parasitized adult male of E. intersecta was collected in Acre, northwestern Brazil,while parasitized adult females of E. anodorhynchi were obtained from trap-nests in São Paulo, southeastern Brazil. For both host species, the parasite-host association was confirmed by rearing the flies from parasitized adult bees. E. anodorhynchi was attacked by Physocephala bipunctata (Macquart, 1843) and E. intersecta by an unidentified species of Physocephala Schiner, 1861. Although our current knowledge is still incipient, parasitism by conopid flies can be considered widespread in euglossine bees, judging from the cases reported so far, which involve different host genera and species distributed widely apart.

International audienceAbstractMale Euglossini bees (Apidae) forage for floral and non-floral perfumes. Although the use of these perfumes has not yet been clearly reported, there are indications of using perfume from varied exogenous sources as a pheromone analogue since male orchid bees do not produce it. Here, we report an interaction between male Euglossa annectans and flowers of Angelonia salicariifolia (Plantaginaceae). Floral anatomy analysis and a histological study of two different sets of trichomes indicate the presence of aromatic oils (perfume) in one set of these trichomes. The other set of trichomes produce resins. Both sets of trichomes are found in the same floral area of the flower where the male orchid bees were seen. The male orchid bees studied forage for perfumes but do not promote pollination since they do not reach the reproductive structures during their visit. Our records show that only male E. annectans were attracted to the volatile fragrance although we know that other orchid bee species also occur in the area

ABSTRACT. Three new species of