Biosystematics of the genus Trirhabda LeConte of America north of Mexico (Chrysomelidae: Coleoptera)By Steve Munroe Hogue
Apparently the most complete overall reference on Trirhabda
to date...it's often repeatedly cited in later publications referring to the genus.
Hard to access in libraries, but can be ordered from UMI/ProQuest
(for "UMI Publication Number", use "7027230").