论文部分内容阅读
蚤的形态:蚤为了适于跳跃,其身体呈扁平,以便于跳时减少空气之阻力。体之颜色为棕红色,侧面观之分头胸腹三部。雌雄皆吸血,其雌雄之区别,如下图,雌者腹部末端为圆形,而雄者可见其尾部向上举。
Flea morphology: fleas in order to jump, his body was flat, so as to reduce the air resistance when jumping. Body color is reddish brown, side view of the three parts of the chest and abdomen. Both male and female vampire, the difference between male and female, as shown below, the female abdomen is rounded, while the male can see the tail up.