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For Insects, Spiders & Their Kin
For the United States & Canada
Photo#48645
Beetle larva - Dendroides canadensis

Beetle larva - Dendroides canadensis
Harms Woods, Glenview, Cook County, Illinois, USA
April 8, 2006
Size: ~18mm
Different lighting which shows the setae along the sides.

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Beetle larva - Dendroides canadensis Beetle larva - Dendroides canadensis

Moved

Pyrochoidae
This long, very flattened shape and long terminal segment are characteristic of the Fire-colored Beetles.

 
Thanks, Jim!
We knew you would know. Now we have to find the adult Fire-colored beetle :-)

 
Put a blister beetle in a pitfall trap
and see if you can lure some male Pyrochroids looking for a cantharidin supply. Either that or rear some larvae. (Feed them termites or ant pupae.) Due to their habits and short lifespan, adults are rarely encountered.

Edit: I was wrong about other subcortical insects being their primary food. Apparently they eat the rotting cambium layer of the bark.

elateriform?
im thinking click beetle larvae