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I found this bug months ago (August, in southern Maine): I found it crawling on my wall, (second floor), only time I've ever seen one of these particular bugs in my house.
Edit: I managed to get a rough measurement based on another photo I had, and it seems to have been about 0.7 inches long (from top of head to bottom end of body) and 0.2 inches wide at widest part ("shoulders")
Found it - almost certainly the Poplar-borer beetle (Saperda calcarata). Distinguishing characteristics are the golden/yellow spots under the black speckles. Borers all have that shape to the head and thorax. Longhorn indicates the long antennae.
These are quite a destructive pest of poplar and a few other species in much of North America.
Note I'm not an entomologist of any sort, or even from North America - just good at googling things.
