Centris (Heterocentris) analis (Fabricius, 1804) nests were studied at the University Campus of Ribeirão Preto, São Paulo, Brazil, from January to December 2003. The females constructed nests in trap-nests made with black cardboard introduced in wood blocks which were placed on the shelves of two shelters built at the study site: sunny area and shady area. In both areas, the immatures mortality occurred mainly in the egg stage; shady area: egg stage (76.7%), larval stage (10.0%) and pupal stage (13.3%); sunny area: egg stage (80.0%), larval stage (6.6%) and pupal stage (13.3%). The mortality difference between the areas (chi2 = 1.0, gl:1, p>0.05) was not great enough to reject the possibility that the difference was due to random sampling variability, however, there were differences of temperature between two areas in all months observed (t-student, p<0.05) and the temperature around 26-27ºC showed to be optimal to Centris analis development.
Hymenoptera; Centris; temperature; immatures mortality; development
