Subject: Found this in my yard last summer
Geographic location of the bug: Sherwood Park, Alberta
Time: 11:13 PM EDT
Your letter to the bugman: This was really big. What is it?
How you want your letter signed: Hi
Based on this BugGuide image, we are pretty confident that your Longicorn is a Poplar Borer, Saperda calcarata, and it is described on BugGuide as being: “Largest of its genus. Prominent spines at tips of elytra. Coloration variable, pastel hues.”