Busck, A. 1909. Notes on Microlepidoptera with descriptions of new North American species. Proceedings of the Entomological Society of Washington 11(2): 98
Internet References
description of adult in preview of the book "A Handbook of the Insects of America North of Mexico" by Ross Arnett (Google Book Search result)
presence in California; list of 9 specimen records of L. trigonana plus dates and locations (U. of California at Berkeley)