Found this guy while cleaning an auto shop in Monrovia CA …startled means then I was intrigued….
Your cool large beetle is a banded alder borer. It is in the longhorn beetle family…named such due to the long antenna.
This beetle lays eggs on dead hardwood trees such as alder, ash, laurel, etc. Since the larvae feed on dead wood, it is not a pest. It just helps break down dead trees.
The adult beetle is found on flowers feeding. If the beetle is handled it is known to make a squeaky or hissing type of sound 🙂
This beetle is found along the west coast of North America.
Sometimes the adult beetles are attracted to drying paint…researchers wonder if the odor is similar pheromones given off by the insect or perhaps it is the smell similar to dying trees.
These beetles are not known to bite.