I am not sure what this is... It is about the size of a full grown tarantula but with less meaty legs and no hair, has six legs, two ridged body segments (one the size of a dime and the other a quater), two large antenna (about 5 inches long each side), and two large pincers/fangs. it crawls like a spider but with only six legs. In the photo you can see a regular soldier ant above and to the left of the thing in question. the Soldier ant is 1/2 to 3/4 of an inch.
It's a Tailless Whipscorpion. They're Arachnids, but not spiders. Maybe genus Phrynus
http://en.wikipedia.org/wiki/Amblypygi
