Wood boring beetle larva

6170  Hello & please help Identify the attached larva;  The hole in the oak floor is where the larva was found. White powder sawdust was removed with an air blast and the larva was coaxed out by injecting wasp foam spray into the bore hole about 3-1/4” long. The home is located between Brantford and Paris Ontario.  Thanks;   Gord

 

This looks more like a larva of a long-horned wood-boring beetle (Coleoptera: Cerambycidae). Larvae of flat-headed wood-boring beetles (Coleoptera: Buprestidae) can be quite similar in appearance except for having their thoracic segments (immediately behind the head) somewhat to greatly flattened (see https://tinyurl.com/yd5n2w9j for an example). This results in their exit holes being noticeably oval in cross section whereas those of round-headed borers are circular or nearly so. Ed Saugstad, retired entomologist; Sinks Grove, WV.