https://www.inaturalist.org/observations/47750517 (pupated and hatched in captivity, surprised me!) The common name is "delta flower scarab". But the yellow triangle on the pronotum is upside down relative to Greek delta, so I call them "nabla flower scarabs" instead. That is okay because common names are not standardized, nor unique. The nabla flower scarab is found May through August in much of the S.E. United states. Members of this species like to spend their time calculating the normal vectors of flower petals. --Brad