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Home » Guide » Arthropods (Arthropoda) » Insects (Insecta) » Ants, Bees, Wasps and Sawflies (Hymenoptera) » Sawflies, Horntails, and Wood Wasps » Stem Sawflies (Cephidae) » Janus » Janus integer
Photo#283896
Wood Wasp, Horntail ??? - Janus integer - male - female
Copyright © 2009 Hugh Casbourn

Wood Wasp, Horntail ??? - Janus integer - Male Female
London, Middlesex, Ontario, Canada
June 3, 2009
Size: approx 1.5 to 2 cm
Early in the day I photographed each of these individuals separately in our suburban backyard and thought they were 2 species. Then I caught them both interacting. The female is ovipositing into the stem of the bush. Note that the leaf has a fungus on it so it is likely a stressed plant. The two interacted constantly over a five minute period including investigating each other with antennas and the male flashing the spots on his wings at her. The female was ovipositing at three spots on the stem during that period. I am surprised at the degree of sexual dimorphism. I am guessing that this is a wood wasp or a horntail. I would appreciate any identification help.

Images of this individual: tag all
Wood Wasp, Horntail ??? - Janus integer - male - female Wood Wasp, Horntail ??? - Janus integer - male - female Wood Wasp, Horntail ??? - Janus integer - male - female
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Contributed by Hugh Casbourn on 4 June, 2009 - 9:02am
Last updated 18 October, 2009 - 11:49pm

Moved
Moved from Tenthredininae.
… v belov, 18 October, 2009 - 11:49pm login or register to post comments

Cephidae, Janus integer (Nort
Cephidae, Janus integer (Norton). Larve are stem borers of Ribes. Often called the currant stem girdler. Female above, male below.
… Dave Smith, 17 July, 2009 - 7:55am login or register to post comments

 
Thanks for the ID, Dave
Quite an honour for these insects to be identified by someone of your stature!
… Hugh Casbourn, 19 October, 2009 - 12:42pm login or register to post comments

Thank you - at least I was cl
Thank you - at least I was close
… Hugh Casbourn, 4 June, 2009 - 11:44am login or register to post comments

sawflies -- can't tell genus, sorry
*
… v belov, 4 June, 2009 - 9:21am login or register to post comments

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