Derus, Arline, of Florissant, Missouri, died on Wednesday, April 27, 2011 at the age of 92. Loving wife of the late Charles L. Derus; beloved daughter of the late Richard and Marie Gasta; devoted mother of Dorothy (Claude) McCaslin, Susan (Bob) Sheils, and Charles (Cindy) Derus, Jr.; cherished grandmother of Dan (Barbara), Josh (Keneen), Matt (Elsie), Mike (Jenn), Maggie (Corey), Cathy (Jonathan) and Alex; treasured great-grandmother of 11. She is preceded in death by her sisters, Elsie Skall, Mildred Krucer and Florence Spleth. Memorials may be made to Autism Speaks.