Cover legend: Gustatory receptors on the moth's lengthy proboscis begin the process of generating neural codes for taste in the brain. Rather than using labeled lines and basic taste categories (sweet, sour, salty, bitter), the gustatory system uses a spatiotemporal population code to generate unique neural representations of individual tastant chemicals. Photo of white-lined sphinx moth (Hyles lineata) by Dr. Graeme Lowe. For more information, see the article by Reiter et al. (pages 12309–12321).