Cicada has two pairs of membranous wings, which are basically the same in shape, with a wide and short head and a prominent forehead and lip base; The vision is quite good, the compound eye is not big, located on both sides of the head and widely separated, with 3 monocles. Antennas are short and bristly. The mouthparts are slender, and there are esophagus and saliva tubes in the mouthparts, which belong to the piercing-sucking type. The chest includes the front chest, the middle chest and the back chest, in which the front chest and the middle chest are longer.

All three chests have a pair of feet, and the leg joints are thick and developed (if the front foot is used for digging, the leg joints are swollen and spiny). Cicada's abdomen is a long cone, with a total of 1 abdominal segments, and the ninth abdominal segment becomes the tail segment. The first and second ventral nodes of the male cicada are equipped with sound generators, and the tenth ventral node forms anus; The 1th ventral node of female cicada forms oviposition tube, which is relatively enlarged.

Extended information:

Life habits of cicadas

The larvae of cicadas live in soil and have a pair of strong digging forelegs. Using the sucking mouthparts to suck the sap from the roots of plants weakens the tree vigor, makes the branches die and affects the growth of trees. Usually I will stay in the soil for several years or even more than ten years, such as three years, five years, and 17 years. These numbers have one thing in common, and they are all prime numbers.

Whenever cicadas are thirsty and hungry, they always insert their hard mouthparts into the trunk to suck the juice all day long, and suck a lot of nutrients and water into their bodies to prolong their life. Cicadas grow in the soil before they are mature, and then slowly dig holes and climb on the trunk. If there is mud in the stolen soil hole, there will be young cicadas. Cicadas lie on the trunk at night and shed their shells, and then they have wings.

The male cicada can sing. Its vocal organ is located in the abdominal muscle, like a big drum covered with a tympanic membrane. The tympanic membrane vibrates and makes sound. Because the vocal muscle can expand and contract about 1, times per second, the gap between the cover plate and the tympanic membrane can play the role of * * *, so its singing sound is particularly loud.