Yellow and Black Wasp - Calameuta clavata

Moved

… John F. Carr, 8 July, 2013 - 8:20pm

Cephidae

Calameuta clavata (Norton). I compared specimens and am quite sure this is clavata. Color of the abdomen (yellow markings) and apparently long cerci place it as clavata. The yellow on the wings is the same in both clavata and cinctus. Calameuta has a bidentate left mandible, distance between antennae and clypeus long, and long cerci; Cephus has a tridentate left mandible, distance between antennae and clypeus short, and very short cerci. These are always difficult to see in photos.

… Dave Smith, 8 July, 2013 - 8:18pm

Hind tibia

In all the photos I looked at of Calameuta clavata, the hind tibiae are darkened throughout, while with Cephus cinctus, they all appear to be yellowish, with dark coloration only near the tarsi. I presume it is not that simple, but wanted to make the observation.

… Jay Keller, 24 June, 2017 - 9:05pm

Dave,

thank you so much for sharing your time and knowledge. I really appreciate it!

… Tamra F, 8 July, 2013 - 8:30pm

Moved

Moved from Stem Sawflies.

… John F. Carr, 4 July, 2013 - 4:42pm

Cephidae

Cephus cinctus or Calameuta clavata. Can't be sure from the pictures.

… Dave Smith, 4 July, 2013 - 7:14am

Thank you,

Dave. I wondered if the yellow band on the leading edge of the front wing might be diagnostic, but can't tell from the pics in the guide if the Cephus cinctus has it? I do have a few additional angles if anything would be helpful. Hard to know sometimes what will be the best images to post.

… Tamra F, 4 July, 2013 - 7:43am

Moved

Moved from ID Request.

… v belov, 1 July, 2013 - 10:36pm

Stem Sawfly…

See reference here.

… Ross Hill, 1 July, 2013 - 9:47pm