What is a reddish black worm looking bug?

Question

They're a little less than an inch long and they have what looks like 10 legs. The kids found them in the back yard on a pecan tree. They make webs. They have a thin white stripe down the middle of their stomach's and each side of them.

Answer 1

http://www.insectimages.org/

http://bugguide.net/node/view/15740

http://greennature.com/article1899.html

http://www.einsteins-emporium.com/life/a...

http://www.whatsthatbug.com/

Answer 2

They are caterpillers.