Mr. Darius, a retired general council and secretary at EPRI in Palo Alto, is survived by his wife, Jo of Los Altos; sons, Henry and Charles of Los Altos; daughters, Elizabeth Fekete, Aimee Powers and Jeannette French of Connecticut; and four grandchildren.
Inurnment was at Alta Mesa Memorial Park in Palo Alto.
The family prefers donations be made to the Mid-Peninsula Hospice Foundation, 65 El Camino Real, Menlo Park 94025.