大草蛉触角感器的扫描电镜观察

利用扫描电镜对大草蛉雌、雄成虫触角进行了亚显微结构的观察与分析，旨在为揭示其嗅觉与行为的关系奠定基础。结果表明大草蛉触角为线形，共3节，即柄节、梗节和鞭节，其中柄节和梗节均为单节，而鞭节由116个亚节组成。雌、雄触角总长度分别为（1.52±0.08）和（1.58±0.23）cm，鞭节长度分别为（1.44±0.04）和（1.47±0.13）cm。触角感器共有4种，分别是毛形感器、锥形感器、刺形感器和Böhm氏鬃毛。其中毛形感器为触角上分布最广、长度最长的感器，共有4种类型，锥形感器有3种类型。感器主要分布在鞭节部位，且布满整个触角表面。雌、雄个体之间触角感器种类、结构、数量、分布均无明显差异，但个别感器长度存在显著差异。根据感器形态学结构特点推测不同感器功能不同。

SEM Observation of Antennal Sensilla of Chrysopa pallens Rambur (Neuroptera: Chrysopidae)

To provide background information for ongoing research on host location mechanisms, we examined the external morphology of antennal sensilla of the green lacewing Chrysopa pallens (Rambur) (Neuroptera: Chrysopidae) using scanning electron microscopy. Antennae of female and male C. pallens are linear in shape and (1.52±0.08) and (1.58±0.23) cm in length, respectively. The scape and pedicel are each composed of one segment, while the flagellum consists of 116 sub-segments, on which most sensilla are distributed. The flagellums of female and male antennae are (1.44±0.04) and (1.47±0.13) cm in length, respectively. Nine morphological sensilla types were recorded in both sexes, including four types of the highly abundant and widely distributed sensilla trichodea (STⅠ, STⅡ, STⅢ and STⅣ), three types of sensilla basiconica (SBⅠ, SBⅡ, and SBⅢ), and one of each type of sensilla chaetica and böhm bristles. Although the shape, structure, numbers, and distribution of antennae of females and males are basically similar, major differences were recorded between the sexes in the length of some sensilla types. Both the STⅢ and SBⅠ are significantly longer in female than in male. Notably, SBⅡ was found only in female. Detailed examination of sensilla morphological features of different sensilla types were discussed in relation to the possible roles in prey location behavior of C. pallens.