东亚飞蝗前翅感受器的类型与分布初步研究

Type and Distribution of Forewings Sensilla of Locusta migratoria manilensis (Insecta,Orthoptera)

利用扫描电镜对东亚飞蝗（Locusta migratoria manilensis）成虫前翅感受器的外部细微结构及分布进行了观察。根据感受器的外部细微结构和分布特点，将东亚飞蝗成虫前翅感受器分为3种类型。类型Ⅰ：感受器长30．80μm，直径一般为5—10μm，基部略有膨大，表面比较光滑，主要分布在前翅背面的前缘脉域和臀脉域的基部，数量（512．6±36．0）个，以及前翅腹面的前缘脉域，中脉域和臀脉域的基部，数量（1278．8±67．8）个；类型Ⅱ：感受器长100-300μm，直径为3—5μm，着生于膨大的毛窝中，主要分布在前翅背面的前缘脉和亚前缘脉上，数量（107．8±5．4）个，以及前翅腹面的前缘脉和径脉上，数量（57．4±2．6）个。类型Ⅲ：感受器长20-40μm，直径为5-10μm，着生于膨大的毛窝中，表面有纵纹，顶部呈弧形弯曲，主要分布在前翅背腹面的肘脉和径分脉上，背面数量（95．4±2．9）个；腹面数量（38．2±1．5）个。另外，对前翅背腹面间的感受器数量的显著性比较，发现前翅背腹面间的感受器数量极显著差异（P〈0．01）。对雌雄性成虫前翅感受器数量的显著性比较，发现雌虫背面的类型Ⅰ感受器和腹面的类型Ⅲ感受器的数量与雄虫有显著差异（P〈0．05），其余类型感受器的数量在雌雄虫间均没有显著差异。

The outer uhrastructure and distribution of forewings sensilla in adult Locusta migratoria manilensis have been investigated by scanning electron microscopy. According to characteristic of outer uhrastructure and distribution of forewings sensilla, there are mainly three types sensilla on the forewings of adult L. migratoria manilensis. Type Ⅰ sensilla range in length from 30 - 60 μm and diameter from 5 - 10 μm, with smooth surface and bulgy base of the sensilla. They chiefly distribute on the basal jugal region and costa region of the dorsal surface and on the basal jugal region, vannal region and costa region of the ventral surface. The number of type Ⅰ sensilla are （512.6 ± 36.0） on the dorsal surface and （1 278.8 ± 67.8） on the ventral surface. Type Ⅱ sensilla are about 100 - 300 μm in length and 3 - 5 μm in diameter and inserted into sockets that have a raised rim. They locate on costa and subcosta of the dorsal surface and subcosta and radius on the ventral surface. The number of type Ⅱ sensilla are （107.8 ± 5.4） on the dorsal surface and （57.4 ± 2.6） on the ventral surface. Type Ⅲ sensilla range in length from 20 - 40 μm and diameter from 5 - 10 μm and are inserted into sockets that have a raised rim, with a bent on the tip. The surface of the type Ⅲ sensilla has shallow grooves. They mainly locate on the cubitus and radius sector of both dorsal and ventral surface. The number of type Ⅲ are （95.4 ＋ 2.9） on the dorsal surface and （38.2 ± 1.5） on the ventral surface. In addition, the number of different sensilla have been compared between the dorsal surface and the ventral surface, as well as between adult females and males. There are significant difference （P 〈 0.01）between two surfaces. Females have more number of type Ⅰ sensilla on the dorsal surface and type Ⅲ sensilla on the ventral surface than those of males （ P 〈 0.05）. There are no significant difference in the number of other types senailla between two sexes.