There are a variety of black bugs that vary in appearance, such as the black stink bug, the boxelder bug and the lovebug. All true bugs have pointed mouthparts, which they use to pierce and suck fluids from plants, animals and other insects.
The black stink bug, Proxys punctulatus, is black with a yellow spot on its back and has cream and black legs. The bug’s body has two symmetrical points at its front and a pointed head. It is approximately 0.4 to 0.5 inches long. Developing black stink bugs are a light see-through brown color, which darkens to black as they mature. Unlike many stink bugs, the black stink bug is not harmful to crops.
The boxelder bug, Boisea trivittatus, is black and develops black or orange markings as it matures. These markings include three stripes directly behind its head. The bug is approximately 1/2-inch long. Boxelder nymphs are bright red. The boxelder bug can be a nuisance due to its tendency to enter homes, but it is not harmful to people, pets or houseplants.
The lovebug, Plecia nearctica, is a type of fly that is solid black with a red thorax, or middle section. Males have larger eyes than females, and females have longer heads. Males are approximately 1/4-inch long, and females are 1/3-inch long. Lovebugs often fly connected in mating pairs.