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Coleoptera, boring larva

Coleoptera, boring larva
Algona, Kossuth County, Iowa, USA
August 31, 2016
August 31, 2016: Matthew Kenne noted several Stiff Goldenrod, Solidago rigida, bored, shriveled, and sprinkled with white frass out the hole.

Moved from ID Request.

hmmm... could this be, say, a Languriine?

I like V. Belov’s suggestio
I like V. Belov’s suggestion of Languriini best for this larva. There is another Languria larva in the guide, and from what I can see in the very fuzzy image that shows the caudal end looks similar to the larva in question.

Coleoptera, boring larva (well, it's not at all boring - really!
I can't be sure from the image & view, but it looks like a tenebrionid – perhaps in the tribe Helopini or near(?)

Oh, I know Boring Beetle.
He was a great help in Double Trouble in Bugland by William Kotzwinkle. Fun book and the illustrations are delightful.

The front end looks very sawfly-like to me, though the terminal segment is odd. No side view of this larva?

stem-boring sawflies?
Cephidae would be the likely sawfly group, but the descriptions I've found (white, with the abdomen terminating with a "tubular prong or horn") not a very good match.

Are you going to put these
on your to-do list, to find and try to rear?
And if he's interested, maybe send some to Charley to try and rear?

boring larva
I thought they were micro Leps when I removed a couple, although I didn't get any side shots to confirm structure. About 1/4 inch long or so. Thrown a bit by the horns on anal segment- I'd not seen that before.

not a Lep
Terry Harrison says definitely not Lep and most likely beetle- microleps don't have "anal horns" or secondary setae on only one body segment.

those long hairs at the anal end are odd though...

Not quite the same but
here are long hairs on the anal end of a lep:

which also happens to bore stems of Goldenrod.

Not a sawfly
I ran this by sawfly taxonomist Dr. David Smith, who replied:

"This goldenrod larva is not a sawfly.  I’ve never seen a sawfly like this, and none have been recorded from goldenrod.  Sometimes it is difficult from pictures and one has to rely on experience, but sawflies would have more distinct annulation on the abdominal segments (3 – 6 distinct annulets per segment), and I have never seen a sawfly larva with the long setae and prongs on the apical segment."

Moved from Beetles.

are you sure this isn't Lepidoptera?

Oh gee
that's my fault. Matt didn't say what he thought it was. I'll move it.

I just automatically think beetle with stem borers although I've found lots more moth larvae in stems than beetles.

Beats me ...
MJ, I've been through insects known to feed on goldenrod foliage, and haven't found anything that really looks right to me. There were some beetle, and some moth larvae that looked similar, but not with cerci.
Bob Z

not foliage feeders-
They were internal stem borers.

needs to be reared. We need more folks rearing.
I'm doing a short rearing workshop at Day of Insects but alas, it's mostly about the things I've done wrong. Sometimes more than once. Oops.

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