Unidentified sawfly larvae on rose

As part of an ongoing persual of unidentified sawfly larvae in the BG gallery, I grouped images with specimens reported to occur on rose (Rosa). (I earlier posted notes of this nature for grass and yellow loosestrife). As sequenced below, there were a total of six images, one from Ontario, one from Pennsylvania, and four from Virginia (all from the same locality [and by the same submitter] on different dates spanning a year):

Ontario......................Pennsylvania.............Virginia (June '04)......Virginia (Aug '04)......Virginia (Oct '04)....Virginia (June '05).

Three reviewers who commented on the above images suggested the genus Allantus (for the first three Virginia images), two of whom suggested the species A. cinctus (for the first two Virginia images); no comments were posted for the other three images. As with my two previous notes, I am not qualified to identify the sawfly species, but thought that compiling their images by host plant might be useful to experts who could.

[Edit: After submitting this note, I noticed that the text for the Ontario photo did not explicitly say "rose" like the other photos. The larva does resemble those in some of the other photos, so I will leave it here with this caveat.]

Contributed by John Pearson on 28 November, 2009 - 8:56pm
Last updated 22 January, 2010 - 1:00pm

New one to consider

Allantus nigritibialis may solve some now or in the future

… John R. Maxwell, 22 January, 2010 - 6:38am

Another one on rose

Mine is similar to G Whiz's larva, rather hairy.
I managed to get three pupae; maybe I will see the adults next spring.

… Beatriz Moisset, 6 January, 2010 - 4:48pm

I saw some on rose but didn't photograph...

July-August in Delaware and southeastern PA. Green with brown heads, like images 1-3 and 5 above. One large rosebush had literally hundreds of them! I didn't photograph them, though, just collected them to feed my lady beetles.

… Abigail Parker, 6 January, 2010 - 9:51am

New photos

and the one linked to it.

… R. Berg, 5 January, 2010 - 9:06pm

Newer photos

Two larvae on the same rose as yesterday's photos. One of them may be the same larva as yesterday. Both now in custody.

… R. Berg, 6 January, 2010 - 10:05pm

This is great work that you're doing, John

What a treat it is to see the larvae grouped in this fashion! Hope this helps Dave Smith make some sense of them.

… john and jane balaban, 28 November, 2009 - 11:02pm

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