Buff thrips are so tiny you can hardly see them. They do eat the blooms on light colored roses. I had a bad case of them earlier but not many now.
I have some small black weavil like bugs that are considerably larger than thrips. They are shiny black and thin about 1/4 inch long. They get into the blooms but they don't do any damage. Baldo said that they were probably just feasting on the nectar.
How about love bugs, had many this year? We have had a few but not nearly as bad as years past. Maybe the late cold and endless drought helped.
Hamp

There is na chilis thrip that is a little bit larger than your "typical" thrip, and it is black. It is a very real problem in the Southeast, not just Florida.

Sandy

Another blackish bug found in flowers is the beneficial pirate bug. It is the shape of an oversized pinhead and quite active.

Chilli thrips are yellow-green in these images. Scroll down to Scirtothrips.

Here is a link that might be useful: pest images