Pigeon tremex

7017.      Just wondering if anyone knows what kind of wasp/hornet this is. Midland, Ontario. Canada

Number 7017. This looks like a pigeon tremex, Tremex columba (Hymenoptera: Siricidae);  Click here for an image. Wasps in this family often are called horntails; they lack a stinger (what looks like one actually is their ovipositor) and are harmless to humans.