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I'm seeing such spots often on dungbeetles (especially Deltochilini) here in Suriname. I've suspected them to be dried up drops of wet manure (they have the same color as howler monkey droppings), but I'm not sure how, exactly, they would end up like this on a beetle.

Cheers, Auke



On Wednesday, 11 October 2017, 21:17, "Floate, Kevin" <[log in to unmask]> wrote:


Hi All:
 
My colleague, Wes Watson, has a project with Onthophagus taurus.  A number of the adult beetles he’s recovering are speckled with yellow spots.  Closer examination reveals what appears to be yeast(?) in the spots.  Have others made a similar observations on beetles?  Photos are attached.
 
Any clue as to what these are?
 
If you can help Wes out, I know he would appreciate it.  Please contact Wes directly at [log in to unmask]
 
Thanks,
 
Kevin
 
Kevin Floate, Research Scientist
Insect Biocontrol | Lutte biologique aux insectes
Lethbridge Research Centre | Centre de recherches de Lethbridge
Agriculture and Agri-Food Canada | Agriculture et Agroalimentaire Canada
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Dr. Kevin Floate, Editor-in-Chief