The tarsal ultrastructures of eight leaf beetle species (Coleoptera: Chrysomelidae) were examined with a scanning electron microscope (SEM). The tarsi of the species examined bear five tarsal segments (tarsomeres) and a pair of apical claws which have accessory claws in some species. The ventral surface of the proximal three tarsomeres is covered with dense tenent setae and six types of setae were found: tapered seta, spatulate seta, discoidal seta, bifid seta with tapered terminal plates, bifid seta with spatulate terminal plates, and bifid seta with drop-shaped terminal plates. The tapered seta with a deflexed and acute apex is usually located on tarsomeres I and II. The spatulate seta with a spatulate terminal plate is usually located on tarsomere III. The discoidal seta is located only on the tarsus of male beetles. The bifid setae which branch into two tips at the distal end of the seta have tapered, spatulate and drop-shaped terminal plates. The function of these setae is briefly discussed.
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