Chasmias lugens ?

Chasmias lugens ?

Observation - Chasmias lugens ?. Description: About 20-22mm ,all black but with a white spot on each side of thorax and one spot on back of thorax ,nectaring on Angelica.

About 20-22mm ,all black but with a white spot on each side of thorax and one spot on back of thorax ,nectaring on Angelica.