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Photo#1488742
Wood-dwelling larvae - Dirrhagofarsus ernae

Wood-dwelling larvae - Dirrhagofarsus ernae
Upper Iowa River Wildlife Management Area, Winneshiek County, Iowa, USA
January 27, 2017
Found in wood of a dead aspen (Populus) -- quaking aspen, I think (P. tremuloides). The tree had been heavily attacked by woodpeckers, which led me to investigate what the birds were so excited about. A single Xylophagus sp. larva (significantly larger than these) was also found in the wood.

All larvae I found were folded in half (?!?!?) inside short, narrow, unstained tunnels in the wood that they apparently created.

Another example, with closeups of a larva

Images of this individual: tag all
Wood-dwelling larvae - Dirrhagofarsus ernae Wood-dwelling larvae - Dirrhagofarsus ernae Wood-dwelling larvae - Dirrhagofarsus ernae

Moved

Moved
Moved from ID Request.

Eucnemidae
Please see my comments on your other image. These are the same family.

 
Thanks again
for taking a look at these :)

Origin of Xylophagidae
Names of families are based on names of genera. Xylophagidae comes from Xylophagus Meigen, 1803.

Meigen, J. W. 1803. Versuch einer neuen Gattungseintheilung der europäischen zweiflügeligen Insekten. Magazin für Insektenkunde (Illiger) 2: 259–281.

 
Thanks John
Found it! Thank goodness for the Biodiversity Heritage Library.

Turns out that in this publication Meigen is coining a new genus (Xylophagus) for a species that was originally called Nemotelus cinctus by De Geer...so, next I'm going to try to track down that paper, in hopes of finding some life history info! :)

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