Centris (Paracentris) xanthomelaena is a ground-nesting solitary bee endemic to Brazil’s Caatinga biome. In this unprecedented study, we described this species’ nesting biology and other features, such as its architecture, nest building dynamics, sex ratio and adult emergence. We selected five aggregations in a fragment of seasonally dry forest. Nests were established on vertical banks and flat soil. The architecture was branched and the brood cells were linearly arranged. Females spent an average of 1.8 days building and supplying each brood cell (n = 13). The C. xanthomelaena bionomy is similar to that reported in bees of the same genus.

Centris ( Paracentris ) xanthomelaena是巴西卡廷加生物群落特有的地面筑巢独居蜂。在这项史无前例的研究中，我们描述了该物种的筑巢生物学和其他特征，例如其结构、筑巢动态、性别比例和成虫出现。我们在一片季节性干燥的森林中选择了五个聚集体。巢建在垂直的岸边和平坦的土壤上。建筑呈分支状，育雏室呈直线排列。雌性平均花费 1.8 天建造和供应每个育雏室 ( n  = 13)。C. xanthomelaena生物学与同属蜜蜂中报道的生物学相似。