none Sensory receptors on the antennae, labial and maxillary palpi, and foretarsi of Microplitis croceipes (Cresson) were examined by scanning electron microscopy. The occurrence of antennal sensilla not described by earlier workers is reported. Generally, there are 6 types of sensilla in adults of M. croceipes, namely, sensilla (s). trichodea, s. basiconica, s. chaetica, s. placodea, s. campaniformia and s. coeloconica. Sensilla placodea, campaniformia and coeloconica occur only on antennal flagella. However, s. trichodea and s. basiconica were present on all structural parts examined. Variants of s. trichodea (Trichodea A, B, C and D) and those of s. basiconica (Basiconica A and B) are described. The present paper documents for the first time the occurrence of Trichodea B, C and D, Basiconica B, s. chaetica, s. campaniformia and s. coeloconica in M. croceipes. Sexual dimorphism in M. croceipes correlates with antennal sensilla type; s. campaniformia are present only on female antennae whereas s. coeloconica and bent-tipped trichoid sensilla (D) occur only on male antennae. Other sensilla types occur in both sexes.