ZenMan, your Zinnias are amazing, as usual!
@Jai_Ganesha ,
That looks like an invasive Brown Marmorated Stink Bug. They are likely feeding on and damaging your Zinnia plants.
Quote from
http://ipm.ucanr.edu/PMG/PESTN... :
"Adults and nymphs inject tissue-destroying enzymes and suck juices from fruit and seeds, creating pockmarks and distortions that make fruit and vegetables unmarketable. Damaged flesh under the skin turns hard and pithy. They can also feed on buds, flowering structures, leaves, and stems, including feeding through the bark of the branches and trunks of young trees. "
http://bugoftheweek.com/blog/2...
http://ento.psu.edu/extension/...
Please check it out. I'd hate to see them destroy all of your work and lovely plants.