Morphology of the Brush-Organs of the Limabean Pod Borer, Etiella zinckenella TREITSCHKE : Lepidoptera : Pyralidae

概要

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The male limabean pod borer, Etiella zinckenella TREITSCHKE, has a pair of brush-organs on the thorax and on sternite 8,and a scale mass on each of the antennae. The brush-organs on the thorax and the scale mass on the antennae are characteristic of the Phycitinae among the Heterocera. The brush-organs on the thorax arise from the top of a slender sclerotized plate diverging from the episternum of the metathorax, close to the bases of the hindwings. The brushes are white and ca. 3 mm in length. Normally the brushues are hidden between the meso- and metathorax, but they are probably exposed during male courthip, when the male raises his abdomen towards the abdominal end of a calling female. The brushes consist of three types of scales : long, short and cover-like scales. Long scales in the center of the brushes are considered disseminators of males scent because of their porous surface and mesh-like internal structure. The brushes on sternite 8 are extruded, and the scale mass on the antennae touches a calling female, during courtship, but no pores could be found on the surface of either scales. Thus, they seem to have other functions insetead of disseminators of male scent.
日本応用動物昆虫学会の論文
1981-11-25