Abstract: In order to know sensilla type, number and distribution on the antennae ofAlcidodesjuglans, the sensilla on the antennae of male adults ofAlcidodesjuglanswas observed by scanning electron microscope. The results showed that nine types of antennal sensilla were identi-fied, including sensilla trichoid, sensilla coeloconica, sensilla chiaetica, sensella basiconca, sensella finger-like and sensilla squamiformia,sensilla cavity, sensilla rod-like, sensilla furcatea. There were obvious differences in the distribution, type and number of sensilla between scape, pedicel and flagellum. The type and number of sensilla on the scape were less, and the type and number of sensilla on the 6thand 7thflagellum were the most, which suggested that the 6thand 7thflagellum are the most strongest parts of antennal receptivity.

Key words: AlcidodesjuglansChao, antenna, sensillum, scanning electron microscopy