Termite antennae appear to be straight, while ant antennae are elbowed. Ants appear distinctly segmented, because of their thin-waisted appearance, whereas termites have a broad appearance. Termite waists are not narrow and their bodies are straight-sided with no constriction.
Of course, the best way to make the determination is to have a professional do an inspection. So if you think you may have termites, give Dave a call at 1-800-400-6009.
Dave's Pest Control
Photo image: www.ces.ncsu.edu/johnston/