The type and characteristic of olfaction sensilla in Asias halodendri
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Key Words：Asias halodendri, olfaction sensilla, SEM
Abstract： The type, ultrastructure and distribution of the olfactory sensilla of the antenna, maxillary palpus and labial palpus of Asias halodendri (Pallas) (Coleoptora: Cerambycidae) were observed with a scanning electron microscope. The results indicate that there are six types and fourteen kinds of sensilla on these three body parts. The antenna has one kind of sensilla trichodea and eight kinds of sensilla basiconicas. There are significant differences between males and females in the length of the sensilla trichodea and sensilla basiconica Ⅱ. Basiconica Ⅲ, basiconica Ⅶ and basiconica Ⅷ are peculiar to females but basiconica Ⅵ is only found in males. The total number of sensilla is greater in females than males, and these are more common on the dorsal than on ventral and lateral surfaces. There are four types and five kinds of sensilla on the maxillary and labial palpus, including two kinds of sensilla styloconica, one kind of sensilla placodea, one kind of sensilla campaniformia and one kind of sensilla eage groove. The sensilla eage groove of females is higher than that of males and males have more ventral than dorsal sensilla.