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Sawfly from Willow Stem gall - Euura

Sawfly from Willow Stem gall - Euura
Maple Springs trail, Cleveland National Forest, Orange County, California, USA
March 22, 2011
Size: 5.7mm bl

Images of this individual: tag all
Sawfly from Willow Stem gall - Euura Willow Stem gall - Euura

Moved tentatively
Moved from Common Sawflies.

Tenthredinidae, Nematinae
If from a willow stem gall, probably Euura sp., but can't tell from picture.

Moved from ID Request.

A lateral shot, in addition to the all too typical dorsal one, would likely have caused you to realize that this was a sawfly rather than an ichneumonid. It is sometimes also convenient for a specialist to be able to expand an image to get a better view, but the images you provide do not permit this. Instead, you provide a border, which is of no diagnostic use and apparently also contravenes Bug Guide policy.

I don't know where the border came from - they are simple jpeg files. And do you mean the images should be sent at much larger size so they can be expanded? I thought Bugguide guidelines specified fairly small files.

Allowable Image File Sizes on BugGuide
Hi, Peter. You may have learned this since your comment above of 6/1/11, but if not, here's some useful info.

Contributors can post large images (up to ~ 3000x3000 pixels), but only BG editors & registered experts will be able to view them at full-size. Others visitors will see resized images with max side length 560 pixels. Larger size access for editors/experts is meant to help them see small details for ID purposes. When an editor/expert clicks on the regular 560x560 image in a post, it reloads the web page with a larger image (which you often have to click again to get the full size). Apparently the size limitation is more an issue of avoiding overly large internet connection throughput than one of storage. More info on this topic appears within forum post here.

PS: Thanks for your efforts to provide images of adults by rearing gall larvae! :-)

My Mistake
I was mistaken; your images don't have a border. As for the size, 560 X 560 is evidently recommended, but I often find it helpful when images are of a more generous size, such as 1024 X 620.

I just noticed the antennal segments are also much longer relative to width than in the braconids and ichneumonids

a tenthredinid sawfly, rather

Why didn't I think of that?

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