There is not any data for a black beetle with a yellow stripe and red tail. You may be looking at the fourlined plant bug. The fourlined plant bug is black and yellow striped but does not have a red tail.
It could be a Plate-thigh or Marsh Beetles or even a diving beetle, its hard to say without a picture or any other description.
It depends on the location what type of beetle it maybe. The description given sounds like a crop beetle.
So far all I could fine is it is a beetle.
No. They are black with yellow stripes; or yellow with black stripes. Does it really matter?
A baby turtle with yellow and black stripes is usually a yellow-bellied slider. Their skin is striped yellow and black, and their shells have yellow and black swirls.
Most bees are yellow and black and have stripes. However, a bee that has two stripes is most likely a bumblebee.
The Flea Beetle has an outer shell of yellow-white with three black stripes. It is usually found in western North America and tend to hide in the soil.
Multicolored Asian Lady Beetle
I was bitten today by a small black insect with yellow stripes, I think it was a spider but I am not too sure.
Most bumble bees have yellow and black stripes.
black & yellow stripes
If the stripes are light in color, maybe even off white it could be a CA king snake.
The black beetle with one yellow spot on its back is a Largus beetle. It is different from the burrowing family and cydnidae.
There is a black and yellow beetle found in the United Kingdom. It's called the wasp beetle and grows to be around 20 mm long.