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Hi folks

Here in Brazil this is also pretty common on top of Dichotomius and 
Ontherus species.

I always thought this would just be "dirt".

Cheers,
Carlos

On 10/11/2017 6:32 PM, JF Mate wrote:
> Yes, I have also seen such defects on Copris, Onitis and some 
> aphodines in Spain, usually in wet conditions (Spring). In dry 
> specimens the defects become darker and generally match the colour of 
> the surrounding exoskeleton. I have always assumed it was due to the 
> integument failing to properly sclerotize due to water saturation 
> during emergence.
>
> Jason
>
> On 11 Oct 2017 21:19, "Floate, Kevin" <[log in to unmask] 
> <mailto:[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] <mailto:[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
>     5403 - 1st Avenue South
>     <https://maps.google.com/?q=5403+-+1st+Avenue+South&entry=gmail&source=g>,
>     P.O. Box 3000 | 5403 - 1^ère Avenue Sud, C.P. 3000
>     Lethbridge, Alberta, CANADA  T1J 4B1
>
>     Email | Adresse courriel: [log in to unmask]
>     <mailto:[log in to unmask]>
>     Telephone | Téléphone: 403-317-2242 <tel:%28403%29%20317-2242>
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>     Teletypewriter | Téléimprimeur: 613-773-2600
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>     Government of Canada | Gouvernement du Canada
>
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>     <http://sites.google.com/site/dungins/homepage>
>
>     Dr. Kevin Floate, Editor-in-Chief
>
>     /The Canadian Entomologist
>     <http://journals.cambridge.org/action/displayJournal?jid=tce>/
>
>

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