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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> > Facsimile | Télécopieur: 403-382-3156 <tel:%28403%29%20382-3156> > Teletypewriter | Téléimprimeur: 613-773-2600 > <tel:%28613%29%20773-2600> > Government of Canada | Gouvernement du Canada > > http://sites.google.com/site/dungins/homepage > <http://sites.google.com/site/dungins/homepage> > > Dr. Kevin Floate, Editor-in-Chief > > /The Canadian Entomologist > <http://journals.cambridge.org/action/displayJournal?jid=tce>/ > > -- Department of Plant Protection FEIS/UNESP Av. Brasil, 56 15385-000 - Ilha Solteira - SP BRAZIL Phone: +55 18 3743-1142 FAX: +55 18 3742-2179 http://www.agr.feis.unesp.br/cahf/home Skype: carlos_flechtmann