This work had as objective to obtain ecological data of Centris (Hemisiella) tarsata Smith's nidification in three ecosystems: riparian forest (MC), mesophitic forest (MM) and eucalyptal (EC), using trap nests made by bamboo canes, distributed in differentiated heights: 1,5 m and 5-12 m high. A total of 41 nests were collected: 31 in EC and 10 in MM, the majority in the upper strata and with the largest frequency of nesting occurring in the dry season. The sex ratio was of 1.9:1 (females/ males) in EC and of 1.08:1 in MM. About 22% of nests of the EC and 40% of MM were parasitized by Mesocheira bicolor (Fabricius 1804) (Hymenoptera, Apidae) and Coelioxys sp. (Hymenoptera, Megachilidae). The pollinic analyses showed a higher quantity of pollen grains of Banisteriopsis sp. (Malpighiaceae) and Cassia sp. (Caesalpiniaceae) in EC area and a species of Caesalpiniaceae Kunth. and Banisteriopsis Robinson in MM area.
Bamboo; bees; pollen
