Mystery insect possibly ichneumon on elk thistle - Acantholyda - BugGuide.Net

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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Ants, Bees, Wasps and Sawflies (Hymenoptera) » "Symphyta" - Sawflies, Horntails, and Wood Wasps » Webspinning and Leafrolling Sawflies (Pamphiliidae) » Cephalciinae » Acantholyda

Photo#991635

Copyright © 2014 Lynn Monroe

Mystery insect possibly ichneumon on elk thistle - Acantholyda

Rocky Mountain NP, Rocky Mountain National Park County, Colorado, USA
July 25, 2014

This mystery insect does have a wasp-like face and the long antennae of an ichneumon. It was on Elk Thistle on the Ute Trail at about 11,750 feet elevation. Any help is much appreciated.

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Mystery insect possibly ichneumon on elk thistle - Acantholyda

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Contributed by Lynn Monroe on 5 September, 2014 - 9:43pm
Last updated 3 February, 2020 - 11:13am

Moved

Moved from Webspinning and Leafrolling Sawflies.

… Ken Wolgemuth, 6 August, 2015 - 8:20pm

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Pamphilidae

A sawfly. Common name: leaf rolling and web spinning sawfly. The caterpillar-like larvae roll leaves or spin webs in which they feed. Some are gregarious, and feed in large groups.

… Joe, 5 September, 2014 - 9:56pm

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Pamphiliidae

Thanks so much for identifying this mystery insect. I had thought of a sawfly, but the only ones I am familiar with are Common Sawflies and Horntails. Pamphiliids are a whole new family for me. Your help is much appreciated.

… Lynn Monroe, 6 September, 2014 - 11:53am

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Moved for expert attention

Moved from ID Request.

Acantholyda?

… Ken Wolgemuth, 5 September, 2014 - 9:51pm

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Acantholyda?

Thanks so much for moving this mystery insect, Ken. And I appreciate your including the image of the Acantholyda, which is very similar to my sawfly on Elk Thistle. In the high elevation where this was seen, there were a very few short shrubby windswept conifers. According to Kaufman & Eaton's field guide, genus Acantholyda has conifer hosts in the Rockies. Probably this genus is correct. At some point I may be able to check in the CU entomology collection for local species. Thank you again -- for all your help.

… Lynn Monroe, 6 September, 2014 - 12:03pm

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