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About the Cover


COVER A scanning electron micrograph of glandular hairs (about 275 micrometers long) on the surface of the pupa of the ladybird beetle Epilachna borealis. The droplets that have been secreted at the tips of these hairs contain a variety of macrocyclic alkaloids, all made of a random assembly of three closely related molecular building blocks. These chemicals protect the pupa from predation. See page 428. [Image: Maria Eisner]

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Science. ISSN 0036-8075 (print), 1095-9203 (online)