HI Kevin,

Find those myself very often ... last time few days ago on taurus or illyricus (have to look in the box to see exactly on what species).
I think is just dung that stick and try on them ... I found that specially when out "hunting" and after some rainy days.

If you want I can do a photo of the specimen.

All my best,
 Cosmin-Ovidiu Manci
 biologist & photographer
 ********************** - cosmln's place - Dragonflies of Romania - Insects - a romanian flora & fauna database and not only
 DSLR Collecting Saves Lives!
 Only after the last tree has been cut down,
 only after the last river has been poisoned,
 only after the last fish has been caught,
 only then will you find that money can not be eaten.
 an old indian saying

On Wed, 10/11/17, Floate, Kevin <[log in to unmask]> wrote:

 Subject: Query RE: mysterious yellow spots on Onthophagus taurus
 To: [log in to unmask]
 Date: Wednesday, October 11, 2017, 10:13 PM
 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
 Any clue as to what these
 If you can help Wes out, I
 know he would appreciate it.  Please contact Wes
 directly at
 [log in to unmask]
 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, P.O. Box 3000 | 5403 -
 1ère Avenue Sud, C.P. 3000
 Lethbridge, Alberta, CANADA  T1J 4B1 
 Email | Adresse
 [log in to unmask]
 Telephone | Téléphone:  403-317-2242
 Facsimile | Télécopieur:  403-382-3156
 Teletypewriter | Téléimprimeur:  613-773-2600
 Government of Canada | Gouvernement du Canada 
 Dr. Kevin Floate,
 The Canadian