Long-jawed orb weaver

Insect ID Source : http://bugguide.net

Long-jawed Orb Weavers are named because of their large chelicerae (fangs), which are, in some species, longer than the spider's cephalothorax.  

long-jawed orb-weavers build circular grid webs but  do not have as many radii, or "spokes," as those of true orb weavers