Abstract:

Antennae surface structure and morphological characters of male and female Dendroctonus armandi were observed with scanning electron microscope(SEM).The results indicated that there were not obvious differences between structure and morphology of male and female.Most of the sensilla were distributed on the club of the antenna that occupied 90.3%,while only 7.4% and 2.3% on scape and funicle.All of the sensilla could be categorized 5 types:sensilla trichodea,sensilla chaeticum,zigzag sensilla,sensilla basiconicum,and bud-shaped sensilla,of which sensilla trichodea and sensilla basiconicum were dominant sensilla types and mainly distributed on the club,zigzag sensilla were secondly number and mainly distributed on the scape and funicle,and only a few on the funicle,while sensilla basiconicum and bud-shaped sensilla were the least number,only 1～3.Sensilla basiconicum distributed on connection between the scape and the first funicle,but bud shape sensilla mainly distributed on the end of scape or the tip of club.

Key words: Dendroctonus armandi, antenna, sensilla