thread-waisted wasp

Mud dauber wasp

6041  Geographical location: Calgary, Alberta.   Relevant information: Found indoors [top floor of a condominium unit]  Season: Summer, warm and sunny weather.  Insect size: ¾ of an inch to 1 ½ inches [found in our condo last summer and this summer, starting in the month of June each year)  The insects NEVER go further into our unit than the bedroom and appear to die shortly after coming into our bedroom—they rarely fly around, and are often found of the floor beside our large bedroom windows. We have no idea how they are getting into the unit (windows are well sealed and these insects are BIG—but they may be coming in through our air ventilation vents, and perhaps this journey into the building and into our unit is what caused them to die to quickly after entering). Any identification information which can be provided would be greatly appreciated; I believe it’s a parasitic wasp (a beneficial ‘pest’), but I of course could be wrong!   Thanks in advance,  Michelle

This is a thread-waisted wasp (Hymenoptera: Sphecidae) in the genus Sceliphron; it might be S. caementarium, known as the black and yellow mud dauber. See for an image and more detailed information. Ed Saugstad, retired entomologist; Sinks Grove, WV.