Population Dynamics of Pachodynerus nasidens (Hymenoptera) in Jamaica

In Jamaica Pachodynerus nasidens (Latr.) nest in disused cells of the solitary mudwasps Sceliphron assimile Dahlbom and Eumenes colona Saussure. P. nasidens is readily caught in trap-nests. Developmental mortality averaged 85.7 % in Sceliphron cells, 79.9 % in Eumenes cells, but only 45.7 % in trap-nests. Mean fecundity at a favourable site was 14.0 + 2.9. The sex-ratio was equivalent to 61.5 ? 4.7 % females. Mortality (and/or emigration) of pre-productive females ranged from 1 8.7 to 78.6 %o.