Form : The body length is 14~17mm. The body shape of the color is dark brown that can be easily change. The head width is wide and the compound eye is reddish brown color. The stammerer will be thin long, is a brown but the lower part side 3 joints respectively the end part is black. Also the 4th joint to be longest the base is light color. The waist which is a center region of the body is thin. It also has a big yellow pattern and black belt on the back part of the stomach, can be seen while it flew.
Other characters : There is a possibility of seeing frequently from above the weed of the field. The imago can be misunderstandwith the bee. Larva is similar to the ants. Imago appears from May tuntil October. The imago joins in and with the larva inhale the juices from the bean plants