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Information, insects and people from the 2019 BugGuide Gathering in Louisiana, July 25-27

Discussion, insects and people from the 2018 gathering in Virginia, July 27-29

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Photos of insects and people from the 2014 gathering in Virginia, June 4-7.

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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.]

New one to consider
Allantus nigritibialis may solve some now or in the future

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.

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.

New photos
and the one linked to it.

 
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.

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.

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