Cover legend: A collage of four types of lateral horn neurons (color) and an olfactory projection neuron (white) superimposed on the brain of a locust. The lateral horn of the insect brain, one of two higher brain areas receiving direct output of olfactory projection neurons, is thought to play several important roles in olfaction. For more information, see the article by Gupta and Stopfer (pages 8138–8148).