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Photo#116259
Sawfly on locust tree

Sawfly on locust tree
Jim Thorpe, Carbon County, Pennsylvania, USA
June 6, 2007
Size: 3/4 inch

Moved
Moved from Locust Sawfly.

Moved
Moved from Nematus abbotii.

Moved
Moved from Locust Sawfly.

tibialis or abbotii?
if N. tibialis has no black markings ... then these photos need clarification

 
Black markings
Where are you getting that information?

 
There are several photos sign
There are several photos signed by "Nematus tibialis." Here are the links and dates, which are important.
https://bugguide.net/node/view/116259/bgimage - June 6, 2007
https://bugguide.net/node/view/522523/bgimage - May 30, 2011
https://bugguide.net/node/view/625881/bgimage - April 2, 2012
https://bugguide.net/node/view/639525/bgimage - May 3, 2012

Then a new message appeared
https://bugguide.net/node/view/768653/bgimage - May 9, 2013
where the molting moment is shown. We see that the black larva turns into green with black spots. And Dave Smith's comment: "Nematus abbotii; N. tibialis has no black markings."

As new information has appeared, all photographs of species "tibialis" and "abbotii" must be checked again.

 
Comment from Dave Smith
Dave is having trouble logging into BugGuide right now, but he saw these photos being moved and said: "I see you changed a lot from Nematus tibialis to Nematus abottii. What I had was right. Of those I have on black locust, Nematus tibialis is the green one (may have some small black dots), N. abottii is almost all black."

 
Thanks for this info!

 
Let's wait a bit
Dave says: "I’ll try to check all those Nematus “tibialis” later this weekend. I guess I should have never commented it has no black marks.; obviously misleading as I was thinking more black vs. green larvae. Sometimes the dates might help though I haven’t checked those yet. N. abottii occurs only in the spring, one generation a year. N. tibialis can occur throughout the year."

 
Excellent!
It will be great if Dave checks them out!

 
Thanks
Makes sense to me!

Moved

Tenthredinidae
Nematinae, Nematus tibialis, a common sawfly on locust.

Moved

Sawfly larva
Nice shot!

Looks rather like this one, also unidentified:


 
Thanks! I was leaning toward
Thanks! I was leaning toward sawfly.

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