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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Beetles (Coleoptera) » Polyphaga » Series Cucujiformia » Longhorn and Leaf Beetles (Chrysomeloidea) » Longhorn Beetles (Cerambycidae) » Prioninae » Prionini » Prionus » subgenus Prionus (Prionus subgenus Prionus) » Broad-necked Root Borer (Prionus laticollis)
Photo#546244
large black beetle with appendage?! - Prionus laticollis - female
Copyright © 2011 James Reben

large black beetle with appendage?! - Prionus laticollis - Female
Fairfield, Somerset County, Maine, USA
July 15, 2011
Size: 1.875 inches
Was found at edge of forest on dead leaf littered area.
Had strange long thing coming out of it and moving a bit. Is this part of the wings?
I could not get it to stay on it's back so no ventral picture but it had rusty colored bands between the black segments.

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large black beetle with appendage?! - Prionus laticollis - female large black beetle with appendage?! - Prionus laticollis large black beetle with appendage?! - Prionus laticollis
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Contributed by James Reben on 15 July, 2011 - 10:37pm
Last updated 7 December, 2011 - 8:01am

Moved
Moved from ID Request.
… Ken Schneider, 4 August, 2011 - 5:44pm login or register to post comments

Female Broad-necked Root Borer.
This is a female of Prionus laticollis. The "appendage" is not a stinger but an egg-laying organ. She also everts it to expose a gland that emits a pheromone that attracts males. These are not pests, despite the name.
… Eric R. Eaton, 15 July, 2011 - 10:44pm login or register to post comments

 
thanks!
I did notice on one side of the organ was what looked like a little breathing tube...maybe that was emitting the pheromone? You can see it in the picture between the color change...
… James Reben, 15 July, 2011 - 11:39pm login or register to post comments

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