It seems like there might be a little confusion with the word "blissus." In English, "blissus" is not a commonly used word. However, it closely refers to a type of insect known as "chinch bugs." Let me explain what chinch bugs are and provide you with some related information.
Chinch Bugs (noun): Small insects that can damage grass and plants, particularly in lawns and gardens. They suck the sap from plants, which can cause the plants to turn yellow and die.
In summary, "blissus" refers to chinch bugs, small insects that can harm plants and grass. You would use the term in discussions about gardening and pest control.