Silver argiope

Description:

The body of Argiope argentata tends to be primarily silver with brown and orange colorations further back on the abdomen on the top, and with a primarily brown underbelly. The legs have bands of orange, black, and silver. The female can be up to 35 mm in length whereas the male tends to be 20 mm or less.(Wikipedia) Pic 4 shows the zig zag pattern of the web.

Habitat:

Spotted on a cactus at the McAllen Nature Center.